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1. Number System
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Q29 of 131 Page 1

Give two examples to show that the product of two irrational numbers may be a rational number.

Take a = (2+) and b =(2 -); a and b are irrational numbers, but their product = 4 - 3 = 1,
is a rational number.
Take c = and d = -; c and d are irrational numbers, but their product = -3,
is a rational number.

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27  Express the following recurring decimals into vulgar fractions :
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Questions · 131
1. Number System
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