| 1. List the first four multiples of:
(a) 5 (b) 15 (c) What is the lowest common multiple of 5 and 15?
2. List the factors of: (a) 24 (b) 18 (c) What is the highest common factor of 18 and 24?
3.Write these numbers as a product of their prime factors. (a) 20 (b) 24 (c) 16
4. Calculate:
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(a)
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(d) 6 2
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(b)
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(e) (2.3) 2
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(c)
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(f) (0.4) 2
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5. Find the reciprocals of:
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(a) 2
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(d)4⁄5
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(b) 0.2
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(e)31⁄2
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(c) 15
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(f) 200
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6. Evaluate (write as a decimal)
(a) 1⁄8 (b) 1⁄2.5 (c) 1⁄250
7. Write the following numbers in standard form:
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(a) 83.2
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(d) 0.00963
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(b) 0.32
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(e) 8.5
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(c) 541.7
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(f) 321 × 10 2
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8. Write the following numbers as ordinary decimals:
(a) 5.12 × 10 2 (b) 3.61 × 10 - 3 (c) 8 × 10 4
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