CSC Company Numerical Ability Permutation and Combination

The number of boys in a class is three times the number of girls. Which one of the following numbers cannot represent the total number of children in the class ?

A. 48 B. 44
C. 42 D. 40

Read Solution (Total 2)

Option C 42

remaining are divisible by 4
12 years agoHelpfull: Yes(1) No(0)

Let number of girls = x and number of boys = 3x.
Then, 3x + x = 4x = total number of students.
Thus, to find exact value of x, the total number of students must be divisible by 4.
4 years agoHelpfull: Yes(0) No(0)

CSC Other Question

Ravi's brother is 3 years senior to him. His father was 28 years of age when his sister was born while his mother was 26 years of age when he was born. If his sister was 4 years of age when his brother was born, what were the ages of Ravi's father and mother respectively when his brother was born ?

A. 32 years, 23 years
B. 32 years, 29 years
C. 35 years, 29 years
D. 35 years, 33 years A shepherd had 17 sheep. All but nine died. How many was he left with ?

A. Nil B. 8
C. 9 D. 17