The edge of a cube is 7a cm. Find its surface?
Options:
(A) 24a8
(B) 24a4
(C) 24a1
(D) 24a2
(E) 294a2
Answer and stream of consciousness: (E)
Stream of consciousness: 6a2 = 6 * 7a * 7a = 294a2

A train running at the speed of 60 km/hr crosses a pole in 3 sec. What is the length of the train?
Options:
(A) 50
(B) 75
(C) 100
(D) 120
(E) 25
Answer and stream of consciousness: (A)
Stream of consciousness: Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 3 = 50 m

In how many different ways can the letters of the word 'PREPTY' be arranged?
Options:
(A) 250
(B) 280
(C) 300
(D) 310
(E) 360
Answer and stream of consciousness: (E)
Stream of consciousness: Number of ways = 61/21 6X5X4X3X2X1 - 360

Find the least number must be added to 228712 so that remaining no.is divisible by 9?
Options:
(A) 5
(B) 3
(C) 1
(D) 6
(E) 2
Answer and stream of consciousness:
(A)
Stream of consciousness: On dividing 228712 by 9 we get the remainder 4, so 5 should be subtracted