Quiz  /  Number system Defence MCQ Questions With Answers

  • 1. 
    Gupta sold few biscuit packets for Rs. 7.50. If the cost of each packet is Rs. 1.50 then how many packets have been sold?

  • 5
  • 15
  • 4
  • 10

  • 2. 
    Which of the following is not an irrational number?

  • √2
  • √3
  • √4
  • π

  • 3. 
    In a group of 80 people, 55 people like Table Tennis and 23 people like both Table tennis and Carrom. Everyone in the group likes at least one of the two games. How many people like only Carrom?

  • 35
  • 60
  • 70
  • 25

  • 4. 
    HCF of 108, 288, 360 is

  • 36
  • 18
  • 9
  • 72

  • 5. 
    The number 494 has

  • Two prime factors
  • Three prime factors
  • Four prime factors
  • No prime factors

  • 6. 
    If n is any natural number, then 52n - 1 is always divisible by a minimum of how many natural numbers?

  • One
  • Four
  • Six
  • Eight

  • 7. 
    If k is divided by 9 we get 3 as the remainder. What will be the remainder when (k + 4) is divided by 3?

  • 2
  • 6
  • 5
  • 1

  • 8. 
    The ratio of two numbers is 7 : 9 and their LCM is 945. What is their HCF?

  • 14
  • 15
  • 10
  • 12

  • 9. 
    Three bells toll at an interval of 6, 8, and 18 minutes respectively. At what time interval do all the bells toll together?

  • 36 minutes
  • 54 minutes
  • 72 minutes
  • 90 minutes

  • 10. 
    5 digit numbers are formed using only 0, 1, 2, 3, 4 exactly once. Find the difference between the maximum and minimum number that can be formed.

  • 42256
  • 32187
  • 19876
  • 32976

  • 11. 
    If a number is divided by 899, the remainder is 63. If the same number is divided by 29, the remainder be:

  • 4
  • 10
  • 2
  • 5

  • 12. 
    A number 3257X33 is divisible by 11. Find the value of X + 3.

  • 4
  • 1
  • 3
  • 5

  • 13. 
    What is the unit digit of 178 × 593 + 157?

  • 1
  • 2
  • 3
  • 7

  • 14. 
    The H.C.F. of two numbers is 43 and the other two factors of their L.C.M. are 17 and 18. The larger of the two numbers is:

  • 454
  • 554
  • 664
  • 774

  • 15. 
    If a positive integer 'n' is divided by 15, the remainder is 4. What is the remainder if 'n2' is divided by 15?

  • 1
  • 0
  • 2
  • 3

  • 16. 
    Find the least number when divided by 5, 7 and 12 leaves the remainder 4 in each case?

  • 424
  • 416
  • 410
  • 414

  • 17. 
    What will be the sum of the greatest and smallest numbers of four digits?

  • 8999
  • 10999
  • 11110
  • 11111

  • 18. 
    Find the least number which when divided by 10, 15, 20, 25 and 30 leaves remainders 7, 12, 17, 22 and 27 respectively.

  • 300
  • 303
  • 297
  • 306

  • 19. 
    Four bulbs light up at the interval of 2, 3, 4 and 5 minutes respectively at some moment. They are lit up together at 8:00 pm. At what time will all bulbs light up together?

  • Night 8:45
  • Night 9:45
  • Night 8:30
  • Night 9:00

  • 20. 
    Find the smallest three digit number when it is divided by 3, 6, 8, 12 leaves a remainder of 2, 5, 7 and 11 respectively?

  • 149
  • 139
  • 150
  • 119
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