Q2 of 104 Page 1

Write down the decimal expansions of the following numbers which have terminating decimal expansions.

Given rational number is


=


Since the denominator is not of the form 2n5m.


has a non-terminating repeating decimal expansion.


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2

Write down the decimal expansions of the following numbers which have terminating decimal expansions.

 2

Write down the decimal expansions of the following numbers which have terminating decimal expansions.

 2

Write down the decimal expansions of the following numbers which have terminating decimal expansions.

 3

The following real numbers have decimal expansions as given below. In each case examine whether they are rational or not. If they are a rational number of the form p/q, what can be said about q?

(i) 7.2345


(ii)


(iii) 23.245789


(iv)


(v) 0.120120012000120000…


(vi) 23.142857


(vii) 2.313313313331…


(viii) 0.02002000220002…


(ix) 3.300030000300003…


(x) 1.7320508…


(xi) 2.645713


(xii) 2.8284271…