SPSC Screening Test CCE Past Paper

Let 1 man’s 1 day work = x and 1 woman’s 1 day work = y.
Then, 4x + 6y = 1/8 and 3x + 7y = 1/10
Solving these two equations, we get:
x = 11/400 and y = 1/400
10 woman’s 1 day work = (1/400 x 10) = 1/40.

Hence, 10 women will complete the work in 40 days.

Why do the police use dogs for detective work?

A) They have sharp eyesight

B) They can run very fast

C) They can hear ultrasonic waves

D) They are easily trainable

A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?

A) 7

B) 8

C) 9

D) 10

Let C’s age be x years. Then, B’s age = 2x years. A’s age = (2x + 2) years.

(2x + 2) + 2x + x = 27

5x = 25

x = 5.

Hence, B’s age = 2x = 10 years.

When 1/4 of a number subtracted from 1/3 of the same number, the remained obtained is 12. The number is:

A) 144

B) 72

C) 120

D) 63

1/3 of the number = 1/3(x) =x/3

1/4 of a number subtracted from 1/3 of the number gives 12.

x/3-x/4 =12

x/3×4/4 – x/4×3/3 =12

4x/12 – 3x/12 =12

(4x-3x)/12=12

4x-3x=12×12

x=144

Therefore,the number is 144.