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Civil Service Commission Professional or Sub-Professional Reviewer - Page 59/159

Mathematics Test I Solution - Page 59

Solutions

1. 16 + 4 x (7 + 8) - 3 = ________?

= 16 + 4 x (15) - 3

= 16 + 60 - 3

= 16 + 57

= 73 *Ans.


2. (18 + 17) (12 + 9) - (7 x 16) (4 + 2) = ________?

= (35) (21) - (112) (6)

= 735 - 672

= 63 *Ans.


3. The sum of 73, 2891, 406 and 98 is _______?

= 73 + 2891 + 406 + 98

= 3468 *Ans.


4. Which of the following numbers is divisible by 24 ?

192 ÷ 24 = 8 *Ans.

286 ÷ 24 = 11 remainder 4, 268 not divisible by 24 because it has a remainder when divided by 24.


5. Which of the following numbers is prime?

a. 57 = 3 x 19

b. 87 = 3 x 29

c. 89 = 89 x 1 *Ans.

d. 91 = 13 x 7


Civil Service Reviewer Post 59/159