Upper Primary Live Problems

Each time you visit the NRICH site there will be some activities which are 'live'. That means we are inviting you to send us your solutions and we will publish a selection of them, along with your name and school. If you'd like to read more about what we're looking for, read this short article.

Stage 1 and 2 Toughnuts

Stage: 1 and 2

These Stage 1 and 2 problems haven't been solved yet. Why not take a look?

Number Detectivelive

Stage: 2 Challenge Level: Challenge Level:1

Follow the clues to find the mystery number.

Coded Hundred Squarelive

Stage: 2 Challenge Level: Challenge Level:1

This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

Mystery Matrixlive

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.

Curious Numberlive

Stage: 2 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?

Satisfying Statementslive

Stage: 2 and 3 Challenge Level: Challenge Level:1

Can you find any two-digit numbers that satisfy all of these statements?