02 Nov '04 12:01

It was Joshua's birthday party and being a surprisingly clever lad for his age he decided to challenge his friends to a little game.

"If anyone can guess the number I'm thinking of they will get a special prize!" he announced.

"I will give you just four clues," he continued.

"One. It is made up of five distinct, non-zero digits.

"Two. The first two digits form the square of the third.

"Three. The last two digits form a number one less than the square of my age.

"Four..."

However before he could give the final clue, Jemma being an equally astute little girl, shouted out the answer with 100% certainty that she was correct and thus claimed the prize.

What was the number Joshua was thinking of?

"If anyone can guess the number I'm thinking of they will get a special prize!" he announced.

"I will give you just four clues," he continued.

"One. It is made up of five distinct, non-zero digits.

"Two. The first two digits form the square of the third.

"Three. The last two digits form a number one less than the square of my age.

"Four..."

However before he could give the final clue, Jemma being an equally astute little girl, shouted out the answer with 100% certainty that she was correct and thus claimed the prize.

What was the number Joshua was thinking of?