## Mathematics Enhancement
The OHP Transparency Collection |

Title or Subject |
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1. | Number Puzzles (up to 5)In each column or row, the number with an arrow shows the sum of the numbers following, and each different colour represents a different digit. |
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2. | Number Puzzles (up to 8)LH puzzle: sums must be true along each row and down each column, and each colour represents a different digit. RH puzzle: the Roman numerals with arrows show the sum of the numbers following, and each different colour and shape represents a different digit. |
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3. | Number Puzzle (up to 15)In each row or column the arrowed number shows the sum of the numbers following, and each different colour and shape represents a different digit. |
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4. | Number Puzzle (up to 20)In each row or column the arrowed number shows the sum of the numbers following, and each different colour and shape represents a different digit. |
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5. | ReflectionsColour the pictures as you would see them if a mirror was placed on the lines. |
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6. | Number Puzzle (multiples of 10 up to 100)In each row or column the arrowed number shows the sum of the numbers following, and each different colour represents a different multiple of 10. |
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7. | Multiplication SquareThe yellow strips should be cut out and placed vertically and horizontally to highlight the multiples required. |
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8. | Multiplication Puzzle (up to 20)The product of the numbers at the corners of each triangle is equal to the number in the middle, and each differently coloured square represents a different digit. |
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9. | Number Puzzle (up to 25)Each link of four numbers adds up to 25, and each differently coloured circle represents a different digit. |
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10. | Number Puzzle (up to 70)In each row or column the arrowed number shows the sum of the numbers following, and each differently coloured rectangle represents a different digit. Note the relationship between some of the numbers shown at the foot of the puzzle |
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11. | Number Puzzles (up to 75 and with inequalities)Each differently coloured rectangle represents a different number that satisfies the inequality shown. LH puzzle: each line of four numbers adds up to 51 RH puzzle: each line of four numbers adds up to 75 |
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12. | Number Puzzles (multiplication of 3 or 4 numbers)LH puzzle: The product of the numbers at the corners of each triangle is equal to the number in the middle. RH puzzle: The product of the numbers at the corners of each quadrilateral is equal to the number in the middle. In both, each differently coloured circle (or square) represents a different digit. |
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13. | Number Puzzles (multiplication of 4 numbers)The product of the numbers at the corners of each quadrilateral is equal to the number in the middle, and each differently coloured shape represents a different digit. |

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