You may also like

problem icon

Consecutive Numbers

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

problem icon

Calendar Capers

Choose any three by three square of dates on a calendar page...

problem icon

Days and Dates

Investigate how you can work out what day of the week your birthday will be on next year, and the year after...

Mini Kakuro

Stage: 3 Short Challenge Level: Challenge Level:1
 

Use seven of the digits from 1 to 9 to fill in each unshaded square, so that no digit is repeated, and the totals of the entries in the rows and columns are as shown.

What number goes in the starred square?

 

 

 

 

This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.