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Question

Which of the following is not equivalent to 788

A
19520
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B
9.75
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C
97.50
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Solution

The correct option is C 97.50
First, simplify the expression.

788=2×392×4
(canceling the common terms)
=394

Now, convert the denominator into a power of 10.
We know that 4×25=100
Multiply numerator and denominator by 25.

39×254×25=975.0100
(shifting the decimal point leftwards according to the number of zeros followed by 1 in the denominator)
=9.7501=9.75

Also, 394=19520 (on multiplying numerator and denominator by 5.

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