Being curious
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problemThink of two numbers
Think of two whole numbers under 10, and follow the steps. I can work out both your numbers very quickly. How?
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problemSquare corners
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
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problemMultiplication squares
Can you work out the arrangement of the digits in the square so that the given products are correct? The numbers 1 - 9 may be used once and once only.
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problemOne wasn't square
Mrs Morgan, the class's teacher, pinned numbers onto the backs of three children. Use the information to find out what the three numbers were.
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problemIn the money
One quarter of these coins are heads but when I turn over two coins, one third are heads. How many coins are there?
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problemShapes on the playground
Sally and Ben were drawing shapes in chalk on the school playground. Can you work out what shapes each of them drew using the clues?
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problemWhat's it worth?
There are lots of different methods to find out what the shapes are worth - how many can you find?
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problemTwenty divided into six
Katie had a pack of 20 cards numbered from 1 to 20. She arranged the cards into 6 unequal piles where each pile added to the same total. What was the total and how could this be done?