In what time a sum of money double itself at 3% per annum simple interest?
Options:
(A) 33 1/8%
(B) 33 1/3%
(C) 33 7/3%
(D) 32 1/3%
(E) 23 1/3%
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P = (P*3*R)/100
R = 33 1/3% So the answer is: (B).
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Ravi can do a piece of work in 11 days while Prakash can do it in 22 days. In how many days will they finish it together?
Options:
(A) 5 7/3 days
(B) 7 1/3days
(C) 5 1/9 days
(D) 5 7/3 days
(E) 4 7/9 days
--
1/11 + 1/22 = 3/22
22/3 = 7 1/3 days So the answer is: (B).
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Which one of the following is not a prime number?
Options:
(A) 51
(B) 61
(C) 71
(D) 82
(E) 91
--
91 is divisible by 7. So, it is not a prime number. So the answer is: (E).
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