mscroggs.co.uk
mscroggs.co.uk

subscribe

# Puzzles

## Archive

Show me a Random Puzzle
▼ show ▼

## Lots of Ones

Is any of the numbers 11, 111, 1111, 11111, ... a square number?

## What is the Sum

What is $$\displaystyle\frac{1}{\sqrt{1}+\sqrt{2}}+\frac{1}{\sqrt{2}+\sqrt{3}}+...+\frac{1}{\sqrt{15}+\sqrt{16}}$$?