question:Ravi can do a piece of work in 25 days while Prakash can do it in 35 days. In how many days will they finish it together?
Options:
(A) 15 7/9 days
(B) 16 17/9 days
(C) 15 1/19 days
(D) 14 7/12 days
(E) 14 7/9 days
answer:(D)
Stream of consciousness:1/25 + 1/35 = 12/175
175/12 = 14 7/12 days

question:In a division sum, the remainder is 5 and the divisor is 3 times the quotient and is obtained by adding 3 to the thrice of the remainder. The dividend is:
Options:
(A) 72
(B) 76
(C) 100
(D) 113
(E) 112
answer:(D)
Stream of consciousness:Diver = (5*3)+3 = 18
3* Quotient = 18
Quotient = 6
Dividend = (Divisor * Quotient) + Remainder
Dividend = (18* 6) + 5 = 113

question:What approximate value should come in place of question mark (?) in the following equation
287.532 + 1894.029 657.48 = 643.095 + ?
Options:
(A) 870
(B) 790
(C) 880
(D) 770
(E) 890
answer:
(C)
Stream of consciousness:? = 285 + 1895 655 645 or, ? = 880