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Find the smallest whole number that must be subtracted from 250 to make it a perfect square.
Use the fact that $1 5^{2} = 225$ and $1 6^{2} = 256$ .

Class 8Estimating Square RootsSquares and Roots

A6
B25
C5
D31

Step-by-Step Solution

The largest perfect square not exceeding 250 is

1 5^{2} = 225

. Subtract 250 - 225 = 25.

Answer: B) 25

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