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Q51. Let C be a positive integer such that C + 7 is divisible by 5. The smallest positive integer n (>2) such that C + n2 is divisible by 5 is:
A. 4
B. 5
C. 3
D. Does not exist
Ans. D
Q52. Four bells begin to toll together and then each one at intervals of 6 s, 7 s, 8 s and 9 s respectively. The number of times they will toll together in the next 2 hr is:
A. 14 times
B. 15 times
C. 13 times
D. 11 times
Ans. A
Q53. The increase in imports in 1982 was what percent of the imports in 1981?
A. 25%
B. 5%
C. 125%
D. 80%
Ans. A
Q54. What is the greatest positive power of 5 that divides 30! exactly?
A. 5
B. 6
C. 7
D. 8
Ans. C
Q55. A sum of Rs 468.75 was lent out at simple interest and at the end of 1 year and 8 months, the total amount of Rs 500 is received. find the rate of interest.
A. 2%
B. 4%
C. 1%
D. 3%
Ans. B