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- Answers
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- 1) a) 8
- b) 8x9 = 72
- c) 4x5x7 = 14O
- d) 2x9x5 = 9O
- e) 88
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- 2) 81 is a square number
- 8 is a cube number
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- 3) 66
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- 4) ....9, 16, 25, 36, 49, 64, 81
- ....27, 64, 125, 216, 343, 512
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- 5) . . . .
- . . . .
- 35² = 3O x 4O + 25 (1225)
- 45² = 4O x 5O + 25 (2O25)
- 55² = 5O x 6O + 25 (3O25)
- 65² = 6O x 7O + 25 (4225)
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