Question

The number of boys in a class are three times the number of girls. Which one of the following number can't represent the total number of children in the class ?

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

Answer 1

Answer: (C)

$42$

Let the number of girls be $x$, then from the question, it is clear that number of boys are $3x$,
Therefore, total no. of students = Number of boys + Number of girls = $3x+x=4x$ Now, the total number of children in the class must be a multiple of $4$
(C) does not qualify this condition.

Therefore, $42$ does not represent the total number of children in the class.