## Mathematics Enhancement Programme (Primary Extension)

The OHP Transparency Collection

 Title or Subject Size 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. [22 k] 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. [24 k] 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. [21 k] 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. [22 k] 5. Reflections Colour the pictures as you would see them if a mirror was placed on the lines. [21 k] 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. [19 k] 7. Multiplication Square The yellow strips should be cut out and placed vertically and horizontally to highlight the multiples required. [21 k] 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. [19 k] 9. Number Puzzle (up to 25) Each link of four numbers adds up to 25, and each differently coloured circle represents a different digit. [25 k] 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 [20 k] 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 [21 k] 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. [20 k] 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. [22 k]