This is another common interview question, but appropriate for primary school. You have 8 balls which look identical. 7 of them have the same weight, while 1 is heavier. How can you find the heavier ball by using a balance with only 2 weighings? The most common way (but this will require 3 weighings) would[…]
Many students struggling with Mathematics questions often moan about how they will never need to apply the Maths theories when they grow up. I beg to differ. Not only does Mathematics train our mind to think critically, which is very crucial in our adult lives, it definitely opens paths to an exciting stream of job[…]
This is apparently a common interview question: In a bid to have more boys, every family in a certain country will continue to try for children until they have a boy. If they have a girl, they’ll keep trying. If they have one boy, they’ll stop. What will be the proportion of girls to boys[…]