Total number of children: [(multiple of 6) x (1 + 1/2)] + 1.

Since this number must be less than 19, the only possible solution for the multiple of 6 is 6 exactly. I therefore have 6 sisters and 3 brothers. We are 10 children in all.

Source: Berrondom, Marie

Categories: Reasoning, Number sense, Multiplication

[Top | Problem]