# Count On

## Explorer

#### Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.

Which number is this? It has 2 digits, it is prime and it is 2 more than a square number. (You make a square number when you multiply something by itself, so 49 is square because it is 7 times 7. A prime number only divides by itself so 2, 3, 5, 7, 11 etc. are primes.)

Answer: 11 or 83