Short Problem Showcase

Current

Short Problem Showcase

Did you know we have a huge archive of short problems?

We have decide to feature some of our favourites, and if this whets your appetite, check out the full collection.
Equal Means link

Equal Means 

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

What value of x makes the mean of the first three numbers in this list equal to the mean of the other four?

Red Card Blue Card link

Red Card Blue Card 

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

Can you arrange the red and blue cards so that the rules are all followed?

Common Remainder link

Common Remainder 

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

144 divided by n leaves a remainder of 11. 220 divided by n also leaves a remainder of 11. What is n?

Magic 7 link

Magic 7 

Stage: 3 Short Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Can you complete this magic square with the numbers from 7 to 15?

Trapezium Arch link

Trapezium Arch 

Stage: 3 Short Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Weekly Problem 27 - 2007
Ten stones form an arch. What is the size of the smallest angles of the trapezoidal stones?