Children's maths puzzle leaves people confused over 'simple' answer Solving this simple children's puzzle isn't as easy as it looks.
There are plenty of puzzle books for children that offer a multitude of brainteasers, ranging from word puzzles to maths questions, and they can all help your child challenge themselves in ways that will improve their cognitive function.
The question was posted on Reddit, where the poster said they got it from a maths workbook designed for middle school children in the US who are between the ages of nine and 14.
Our brains have been developed for a while, and although it is still vital that we keep the cogs turning as much as possible, the level of puzzles that we find difficult is much higher than those made for kids.
But one quiz question designed for children has been leaving adults stumped - especially when they see what the answer should be.
