q: A boy runs 200 metres in 24 seconds. What is his speed?
Options:
(A) 20 km/hr
(B) 24 km/hr
(C) 30 km/hr
(D) 32 km/hr
(E) 34 km/hr
a: OK... 200/24 * 18/5 = 30 km/hr
The answer is (C).

q: A person deposits 1/16 of his income as Provident Fund and 1/15 of the remaining as insurance premium. If he spends 5/7 of the balance on domestic needs and deposits an amount of Rs. 50 in the bank, his total income would be
Options:
(A) 150
(B) 200
(C) 250
(D) 300
(E) 350
a: OK... (1-(1/16))(1-(1/15))(1-(5/7)) of Income = 50
Hence income = 200
The answer is (B).

q: What should come in place of the question mark (?) in the following equation?
5978 + 6134 + 7014 = ?
Options:
(A) 19226
(B) 16226
(C) 19216
(D) 19126
(E) None of these
a:
OK... ? = 5978 + 6134 + 7014 = 19126
The answer is (D).