76. In some quantity of ghee, 60 percent is pure ghee and 40 percent is vanaspati. If 10 kg of pure ghee is added, then the strength of vanaspati ghee becomes 20 percent. The original quantity was:
(A) 10 kg
(B) 20 kg
(C) 30 kg
(D) 40 kg
Answer:
Explanation:
77. Subtracting 6 percent of x from x is equivalent to multiplying x by how much?
(A) 0.094
(B) 0.94
(C) 9.4
(D) 94
Answer:
Explanation:
78. 252 can be expressed as a product of primes as:
(A) 2 x 2 x 3 x 3 x 7
(B) 2 x 2 x 2 x 3 x 7
(C) 3 x 3 x 3 x 3 x 7
(D) 2 x 3 x 3 x 3 x 7
Answer:
Explanation:
79. A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting point?
(A) 26 minutes 18 seconds
(B) 42 minutes 36 seconds
(C) 45 minutes
(D) 46 minutes 12 seconds
Answer:
Explanation:80. The least number which when divided by 5, 6, 7, and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is:
(A) 1677
(B) 1683
(C) 2523
(D) 3363
Answer:
Explanation: