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IGCSE CIE Math Numbers

25 practice questions on Numbers

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1. 1) 8     15     18     33     39     41     51     57     60     81
From this list, write down
i) a factorof54,

ii) a multipleof19,

iii) a prime number.

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2. 2) a. Write down all the factors of 16.
b. Write down a prime number between 30 and 40.

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3. 3) 22    17    25    41    39    4
Work out the diffence between the two prime numbers in the list above.

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4. 4) Write 432 as a product of its prime factors.

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5. 5) Write 54 as a product of its prime factors.

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6. 6) i) Write down the reciprocal of 15.

ii) Write down thevalueof15°.

iii) Write0.015 in standard form.

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7. 7)

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8. 8)

 

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9. 9)

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10. 10)

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11. 11)

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12. 12)

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