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Place the number puzzles

Place the number puzzles. http://hench-maths.wikispaces.com. Instructions. These problems can either be displayed for a whole class on a smart board or data projector.

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Place the number puzzles

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  1. Place the number puzzles http://hench-maths.wikispaces.com

  2. Instructions • These problems can either be displayed for a whole class on a smart board or data projector. • Students could be given the file and “play” with each puzzle in edit mode by selecting and moving the textboxes containing the numbers. (they can’t move the numbers in view-show mode)

  3. HAITCH 2 3 4 5 6 7 1 • Use the numbers 1 to 7, once only so that all three lines have the same total. • How many different possibilities are there? • Prove that 6 and 7 cannot be in the same line. • Prove that the centre of the H must be even.

  4. CROSS CUT 1 2 3 4 5 6 • Use the numbers 1 to 6, once only • The row of 3 must add up to the column of 4 • Prove that the centre number must be odd • How many different solutions are there?

  5. IT ADDS UP 1 2 3 4 5 • Use the numbers 1 to 5, once only • The row of 3 must add up to the column of 3 • Prove that the centre number must be odd • How many different solutions are there?

  6. EQUALIZING 1 2 3 4 5 6 • Use the numbers 1 to 6 once only • Line totals must be equal • Establish that there are only 4 solutions • Prove that the numbers 1 and 6 must be together

  7. DEDUCT & DEDUCE 1 2 3 4 5 6 • Use the numbers 1 to 6 once only. • Each circle is the positive difference between the two circles below it. • Prove that there are only four different ways of doing this if reflections are not counted.

  8. Number Go Round 1 2 3 4 • Place the numbers 1 to 8 in each space so that all sums are correct 5 6 7 8 MAV

  9. Number Tiles 1 2 3 4 Place the numbers 1 to 9 onto the squares so that they make a correct addition sum 5 6 7 8 9 MAV

  10. Arithmagon 1 1 2 3 4 5 6 • The number in the square is the sum of the two circle numbers • Can you place the correct numbers 7 8 9 10 13 8 9 MAV

  11. Arithmagon 1 1 2 3 4 5 6 • The number in the square is the sum of the two circle numbers • Can you place the correct numbers 7 8 9 10 10 5 13 MAV

  12. Arithmagon 1 1 2 3 4 5 6 • The number in the square is the sum of the two circle numbers • Can you place the correct numbers 7 8 9 10 5 5 4 MAV

  13. Arithmagon 1 1 2 3 4 5 6 • The number in the square is the sum of the two circle numbers • Can you place the correct numbers 7 8 9 10 13 12 11 MAV

  14. 1 to 19 Place the numbers from 1 through 19 in the circles so that the numbers in every 3 circles on a straight line total 30. 7 13 8 14 3 9 15 4 10 16 5 11 17 6 12 18 19

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