1988 AJHSME Problems/Problem 8

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Problem

Betty used a calculator to find the product $0.075 \times 2.56$ . She forgot to enter the decimal points. The calculator showed $19200$ . If Betty had entered the decimal points correctly, the answer would have been

$\text{(A)}\ .0192 \qquad \text{(B)}\ .192 \qquad \text{(C)}\ 1.92 \qquad \text{(D)}\ 19.2 \qquad \text{(E)}\ 192$

Solution

The decimal point of 0.075 is three away from what Betty punched in, and that of 2.56 is two away. The decimal point is therefore $3+2=5$ units to the left of where it should be, so we would want $.19200\Rightarrow \mathrm{(B)}$ .

1988 AJHSME (Problems • Resources)
Preceded by Problem 7	Followed by Problem 9
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1988 AJHSME Problems/Problem 8

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