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?
Q1. 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?
Answer: 42
Explanation: Boys = 3 × girls, so total = 4 × girls and must be divisible by 4; 42 is not divisible by 4, so it cannot represent the total.