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Number System Quiz with Answers: Master Math Basics

Guddu Kumar
  1. 3 × 10000 + 0 × 1000 + 8 × 100 + 0 × 10 + 7 × 1 is same as
    1. 30087
    2. 30807
    3. 3807
    4. 3087
  2. 1 billion is equal to
    1. 100 millions
    2. 10 millions
    3. 1000 lakhs
    4. 10000 lakhs
  3. Which of the following numbers in Roman Numerals is incorrect?
    1. LXII
    2. XCI
    3. LC
    4. XLIV
  4. Which of the following is not defined?
    1. 5 + 0
    2. 5 – 0
    3. 5 × 0
    4. 5 ÷ 0
  5. The product of a non-zero whole number and its successor is always divisible by
    1. 2
    2. 3
    3. 4
    4. 5
  6. The number of factors of 36 is
    1. 6
    2. 7
    3. 8
    4. 9
  7. The sum of first three common multiples of 3, 4 and 9 is
    1. 108
    2. 144
    3. 252
    4. 216
  1. The product of the place values of two 2’s in 428721 is
    1. 4
    2. 40000
    3. 400000
    4. 40000000
  2. 3 × 10000 + 7 × 1000 + 9 × 100 + 0 ×10 + 4 is the same as
    1. 3794
    2. 37940
    3. 37904
    4. 379409
  3. If 1 is added to the greatest 7- digit number, it will be equal to
    1. 10 thousand
    2. 1 lakh
    3. 10 lakh
    4. 1 crore
  4. The expanded form of the number 9578 is
    1. 9 × 10000 + 5 × 1000 + 7 × 10 + 8 × 1
    2. 9 × 1000 + 5 × 100 + 7 × 10 + 8 × 1
    3. 9 × 1000 + 57 × 10 + 8 × 1
    4. 9 × 100 + 5 × 100 + 7 × 10 + 8 × 1
  5. When rounded off to nearest thousands, the number 85642 is
    1. 85600
    2. 85700
    3. 85000
    4. 86000
  6. The largest 4-digit number, using any one digit twice, from digits 5, 9, 2 and 6 is
    1. 9652
    2. 9562
    3. 9659
    4. 9965
  7. In Indian System of Numeration, the number 58695376 is written as
    1. 58,69, 53, 76
    2. 58,695,376
    3. 5,86,95,376
    4. 586,95,376
  8. One million is equal to
    1. 1 lakh
    2. 10 lakh
    3. 1 crore
    4. 10 crore
  9. The greatest number which on rounding off to nearest thousands gives 5000, is
    1. 5001
    2. 5559
    3. 5999
    4. 5499
  10. Keeping the place of 6 in the number 6350947 same, the smallest number obtained by rearranging other digits is
    1. 6975430
    2. 6043579
    3. 6034579
    4. 6034759
  11. Which of the following numbers in Roman numerals is incorrect?
    1. LXXX
    2. LXX
    3. LX
    4. LLX
  12. The largest 5-digit number having three different digits is
    1. 98978
    2. 99897
    3. 99987
    4. 98799
  13. The smallest 4-digit number having three different digits is
    1. 1102
    2. 1012
    3. 1020
    4. 1002
  14. Number of whole numbers between 38 and 68 is
    1. 31
    2. 30
    3. 29
    4. 28
  15. The product of successor and predecessor of 999 is
    1. 999000
    2. 998000
    3. 989000
    4. 1998
  16. The product of a non-zero whole number and its successor is always
    1. an even number
    2. an odd number
    3. a prime number
    4. divisible by 3
  17. A whole number is added to 25 and the same number is subtracted from 25. The sum of the resulting numbers is
    1. 0
    2. 25
    3. 50
    4. 75
  18. Which of the following is not true?
    1. (7 + 8) + 9 = 7 + (8 + 9)
    2. (7 × 8) × 9 = 7 × (8 × 9)
    3. 7 + 8 × 9= (7 + 8) × (7 + 9)
    4. 7 × (8 + 9)= (7 × 8) + (7 × 9)
  19. By using dot (.) patterns, which of the following numbers can be arranged in all the three ways namely a line, a triangle and a rectangle?
    1. 9
    2. 10
    3. 11
    4. 12
  20. Which of the following statements is not true?
    1. Both addition and multiplication are associative for whole numbers.
    2. Zero is the identity for muliplication of whole numbers.
    3. Addition and multiplication both are commutative for whole numbers.
    4. Multiplication is distributive over addition for whole numbers.
  21. Which of the following statements is not true?
    1. 0 + 0 = 0
    2. 0 – 0 = 0
    3. 0 × 0 = 0
    4. 0 ÷ 0 = 0
  22. The predecessor of 1 lakh is
    1. 99000
    2. 99999
    3. 999999
    4. 100001
  23. The successor of 1 million is
    1. 2 millions
    2. 1000001
    3. 100001
    4. 10001
  24. Number of even numbers between 58 and 80 is
    1. 10
    2. 11
    3. 12
    4. 13
  25. Sum of the number of primes between 16 to 80 and 90 to 100 is
    1. 20
    2. 18
    3. 17
    4. 16
  26. Which of the following statements is not true?
    1. The HCF of two distinct prime numbers is 1
    2. The HCF of two co prime numbers is 1
    3. The HCF of two consecutive even numbers is 2
    4. The HCF of an even and an odd number is even.
  27. The number of distinct prime factors of the largest 4-digit number is
    1. 2
    2. 3
    3. 5
    4. 11
  28. The number of distinct prime factors of the smallest 5-digit number is
    1. 2
    2. 4
    3. 6
    4. 8
  29. If the number 725498 is divisible by 22, the digit at is
    1. 1
    2. 2
    3. 6
    4. 0
  30. The largest number which always divides the sum of any pair of consecutive odd numbers is
    1. 2
    2. 4
    3. 6
    4. 8
  31. A number is divisible by 5 and 6. It may not be divisible by
    1. 10
    2. 15
    3. 30
    4. 60
  32. The sum of the prime factors of 1729 is
    1. 13
    2. 19
    3. 32
    4. 39
  33. The greatest number which always divides the product of the predecessor and successor of an odd natural number other than 1, is
    1. 6
    2. 4
    3. 16
    4. 8
  34. The number of common prime factors of 75, 60, 105 is
    1. 2
    2. 3
    3. 4
    4. 5
  35. Which of the following pairs is not coprime?
    1. 8, 10
    2. 11, 12
    3. 1, 3
    4. 31, 33
  36. Which of the following numbers is divisible by 11?
    1. 1011011
    2. 1111111
    3. 22222222
    4. 3333333
  37. LCM of 10, 15 and 20 is
    1. 30
    2. 60
    3. 90
    4. 180
  38. LCM of two numbers is 180. Then which of the following is not the HCF of the numbers?
    1. 45
    2. 60
    3. 75
    4. 90
  1. The place value of 6 In the numeral 48632950 is
    1. 6
    2. 632950
    3. 600000
    4. 486
  2. The face value of 4 in the numeral 89247605 is
    1. 4
    2. 40000
    3. 47605
    4. 8924
  3. The difference between the place value and the face value of 5 in the numeral 7865342 1 is
    1. 53416
    2. 4995
    3. 49995
    4. None of these
  4. The smallest counting number is
    1. 0
    2. 1
    3. 10
    4. None of these
  5. How many 4-digit numbers are there?
    1. 8999
    2. 9000
    3. 8000
    4. None of these
  6. How many 7-digit numbers are there?
    1. 8999999
    2. 9000000
    3. 1000000
    4. None of these
  7. How many 8-digit numbers are there?
    1. 99999999
    2. 89999999
    3. 90000000
    4. None of these
  8. What comes Just before 1000000?
    1. 99999
    2. 999999
    3. 9999999
    4. None of these
  9. Which of the following is not meaningful?
    1. VX
    2. XV
    3. XXV
    4. XXXV
  10. Which of the following is not meaningful?
    1. CI
    2. CII
    3. IC
    4. XC
  11. Which of the following is not meaningful?
    1. XIV
    2. XVV
    3. XIII
    4. XXII
  1. Which of the following numbers is divisible by 3?
    1. 24357806
    2. 35769812
    3. 83479560
    4. 3336433
  2. Which of the following numbers is divisible by 9?
    1. 8576901
    2. 96345210
    3. 67594310
    4. None of these
  3. Which of the following numbers is divisible by 4?
    1. 78653234
    2. 98765042
    3. 24689602
    4. 87941032
  4. Which of the following numbers is divisible by 8?
    1. 96354142
    2. 37450176
    3. 57064214
    4. None of these
  5. Which of the following numbers is divisible by 6?
    1. 8790432
    2. 98671402
    3. 85492014
    4. None of these
  6. Which of the following numbers is divisible by 11?
    1. 3333333
    2. 1111111
    3. 22222222
    4. None of these
  7. Which of the following is a prime number?
    1. 81
    2. 87
    3. 91
    4. 97
  8. Which of the following is a prime number?
    1. 117
    2. 171
    3. 179
    4. None of these
  9. Which of the following is a prime number?
    1. 323
    2. 361
    3. 263
    4. None of these
  10. Which of the following are co-primes?
    1. 8, 12
    2. 9, 10
    3. 6, 8
    4. 15, 18
  11. Which of the following is a composite number?
    1. 23
    2. 29
    3. 32
    4. None of these
  12. The HCF of 144 and 198 is
    1. 9
    2. 12
    3. 6
    4. 18
  13. The HCF of 144, 180 and 192 is
    1. 12
    2. 16
    3. 18
    4. 8
  14. Which of the following are co-primes?
    1. 39, 91
    2. 161, 192
    3. 385, 462
    4. None of these
  15. 289391 when reduced to the lowest terms is
    1. 1123
    2. 1331
    3. 1731
    4. 1723
  16. The greatest number which divides 134 and 167 leaving 2 as remainder in each case is
    1. 14
    2. 17
    3. 19
    4. 33
  17. The LCM of 24, 36, 40 is
    1. 4
    2. 90
    3. 360
    4. 720
  18. The LCM of 12, 15, 20, 27 is
    1. 270
    2. 360
    3. 480
    4. 540
  19. The smallest number which when diminished by 3 is divisible by 14, 28. 36 and 45, is
    1. 1257
    2. 1260
    3. 1263
    4. None of these
  20. The HCF of two co-primes is
    1. the smaller number
    2. the larger number
    3. 1
    4. None of these
  21. If a and b are co-primes, then their LCM is
    1. 1
    2. ab
    3. ab
    4. None of these
  22. The product of two numbers is 2160 and their HCF is 12. The LCM of these numbers is
    1. 12
    2. 25920
    3. 180
    4. None of these
  23. The HCF of two numbers is 145 and their LCM is 2175. If one of the numbers is 725, the other number is
    1. 290
    2. 435
    3. 5
    4. None of these
  24. The least number divisible by each of the numbers 15, 20, 24,32 and 36 is
    1. 1660
    2. 2880
    3. 1440
    4. None of these
  25. Three bells toll together at intervals of 9, 12, 15 minutes. If they start tolling together, after what time will they next toll together?
    1. 1 hour
    2. 112 hours
    3. 212 hours
    4. 3 hours
  1. The smallest whole number is
    1. 2
    2. 0
    3. 1
    4. None of these
  2. The least number of 4 digits which is exactly divisible by 9 is
    1. 1018
    2. 1026
    3. 1009
    4. 100857
  3. The largest number of 6 digits which is exactly divisible by 16 is
    1. 999980
    2. 999982
    3. 999984
    4. 999964
  4. What least number should be subtracted from 10004 to get a number exactly divisible by 12?
    1. 4
    2. 6
    3. 8
    4. 20
  5. What least number should be added to 10056 to get a number exactly divisible by 23?
    1. 5
    2. 18
    3. 13
    4. 10
  6. What whole number is nearest to 457 which is divisible by 11?
    1. 450
    2. 451
    3. 460
    4. 462
  7. How many whole numbers are there between 1018 and 1203?
    1. 185
    2. 186
    3. 184
    4. None of these
  8. A number when divided by 46 gives 11 as quotient and 15 as remainder. The number is
    1. 491
    2. 521
    3. 701
    4. 679
  9. In a division sum, we have dividend = 199, quotient = 16 and remainder = 7. The divisor is
    1. 11
    2. 23
    3. 12
    4. None of these
  10. 7589 − ? = 3434
    1. 11023
    2. 4245
    3. 4155
    4. None of these
  11. 587 × 99 = ?
    1. 57213
    2. 58513
    3. 58113
    4. 56413
  12. 4 × 538 × 25 = ?
    1. 32280
    2. 26900
    3. 53800
    4. 10760
  13. 24679 × 92 + 24679 × 8 = ?
    1. 493580
    2. 1233950
    3. 2467900
    4. None of these
  14. 1625 × 1625 − 1625 × 625 = ?
    1. 1625000
    2. 162500
    3. 325000
    4. 812500
  15. 1568 × 185 × 1568 × 85 = ?
    1. 7840
    2. 15680
    3. 156800
    4. None of these
  16. (888 + 777 + 555) = (111 × ?)
    1. 120
    2. 280
    3. 20
    4. 140
  17. The sum of two odd numbers is
    1. an odd number
    2. an even number
    3. a prime number
    4. a multiple of 3
  18. The product of two odd numbers is
    1. an odd number
    2. an even number
    3. a prime number
    4. None of these
  19. If a is a whole number such that a + a = a, then a = ?
    1. 2
    2. 1
    3. 3
    4. none
  20. The predecessor of 10000 is
    1. 10001
    2. 9999
    3. None of these
  21. The successor of 1001 is
    1. 1000
    2. 1002
    3. 200
    4. None of these
  22. The smallest even whole number is
    1. 0
    2. 2
    3. 3
    4. None of these
  1. 8 + 4 ÷ 2 × 5 = ?
    1. 30
    2. 50
    3. 18
    4. None of these
  2. 54 ÷ 3 of 6 + 9 = ?
    1. 117
    2. 12
    3. 65
    4. None of these
  3. 13 − (12 − 6 + 3) = ?
    1. 11
    2. 3
    3. 73
    4. None of these
  4. 1001 ÷ 11 of 13 = ?
    1. 7
    2. 1183
    3. 847
    4. None of these
  5. 133 + 28 ÷ 7 − 8 × 2 = ?
    1. 7
    2. 121
    3. 30
    4. None of these
  6. 3640 − 14 ÷ 7 × 2 = ?
    1. 3636
    2. 1036
    3. 1819
    4. None of these
  7. 100 × 10 − 100 + 2000 ÷ 100 = ?
    1. 29
    2. 920
    3. 473
    4. None of these
  8. 27 − [18 − {16 − (5 4−1―)}] = ?
    1. 25
    2. 23
    3. 90
    4. None of these
  9. 32 − [48 ÷ {36 − (27 − 4−1―)}] = ?
    1. 29
    2. 52017
    3. 8
    4. None of these
  10. 8 − [28 ÷ {34 − (36 − 18 ÷ 9 × 8)}] = ?
    1. 6
    2. 649
    3. 8
    4. None of these
  1. 15 + 5 ÷ 5 × 2 = ?
    1. 8
    2. 2
    3. 17
    4. None of these
  2. 16 − 2 ÷ 7 + 6 × 2 = ?
    1. 16
    2. 14
    3. 2757
    4. None of these
  3. 54 ÷ 3 of 6 + 9 = ?
    1. 117
    2. 12
    3. 65
    4. None of these
  1. The number which is neither prime nor composite is
    1. 0
    2. 1
    3. 2
    4. 3
  2. What least number should be replaced for * so that the number 657301*2 is exactly divisible by 9?
    1. 5
    2. 6
    3. 7
    4. 8
  3. Which of the following is a prime number?
    1. 143
    2. 131
    3. 147
    4. 161
  4. Every counting number has an infinite number of
    1. factors
    2. multiples
    3. prime factors
    4. none of these

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