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Preparartion for IPM (IIM-Indore)

Posted on Dec 23, 2016 11:15 AM

When you reverse the digits of the number 13 the no increases by 18 How many total two digit nos increase by 18 when their digits are reversed

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7 as difference would be 18 when we increase ten digit by 2 and decrease one\'s digit by 2. so answers would be 13,24,……79

Take 2 digit no as 10x y is the hint

7 is correct ans

7