Find the sum by suitable rearrangement:
$34 + 35 + 36 + 37 + 65 + 63 + 64 + 66$

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Solution

The given form of the expression is $34 + 35 + 36 + 37 + 65 + 63 + 64 + 66$
$∴ 34 + 35 + 36 + 37 + 65 + 63 + 64 + 66 = (34 + 66) + (35 + 65) + (36 + 64) + (37 + 63) = 100 + 100 + 100 + 100 = 400$
Hence, the sum of the given expression by suitable rearrangement is $400 .$

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