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Grouping Goodies

Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?

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What Number?

I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.

More Numbers in the Ring

Stage: 1 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Try putting one of the numbers in any square to start with. What numbers could go on each side of it? When you add the numbers in two joined squares, what kind of number do you get?
You might like to print off these sheets of blank rings to help you try out some different numbers:
Sheet with 3-number rings
Sheet with 4-number rings
Sheet with 5-number rings
Sheet with 6-number rings