1.  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. 40
B. 42
C. 44
D. 46

Answer: Option B

Explanation:

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.