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The Naked Pair in Sudoku
A particular technique for solving Sudoku puzzles, known as "naked pair", is explained in this easy-to-read article.
problem
1 out of 3
An Average Average Speed
14 to 16
1 out of 3
My average speed for a journey was 50 mph, my return average speed of 70 mph. Why wasn't my average speed for the round trip 60mph ?
problem
1 out of 3
Favourite
Box Plot Match
14 to 16
1 out of 3
Match the cumulative frequency curves with their corresponding box plots.
problem
1 out of 3
Strange Bank Account (part 2)
11 to 14
1 out of 3
Investigate different ways of making £5 at Charlie's bank.
problem
2 out of 3
Favourite
Finding Fifteen
7 to 11
2 out of 3
Tim had nine cards each with a different number from 1 to 9 on it. How could he have put them into three piles so that the total in each pile was 15?
problem
1 out of 3
Favourite
Paper Partners
5 to 7
1 out of 3
Can you describe a piece of paper clearly enough for your partner to know which piece it is?
article
Mathematical Problem Solving in the Early Years: Developing Opportunities, Strategies and Confidence
In this article for Early Years practitioners, Dr Sue Gifford outlines ways to develop children's problem-solving strategies and confidence in problem solving.
problem
1 out of 3
Favourite
Domino Sets
7 to 11
1 out of 3
How do you know if your set of dominoes is complete?
problem
2 out of 3
Favourite
Remainders
7 to 14
2 out of 3
I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?