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If a three-digit number formed with three nonzero digits is decreased
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17 May 2022, 01:00
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11% (02:29) correct
88% (01:57) wrong based on 17 sessions
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If a three-digit number formed with three nonzero digits is decreased by a value of a two-digit number that is formed by the first and last digits of the three-digit number, which of the following can not be the result?
Re: If a three-digit number formed with three nonzero digits is decreased
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17 May 2022, 04:37
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180 is possible if you take 191 to be the 3 digit number then the corresponding 2 digit number formed is 11. Subtracting 11 from 191 would result in 180. So none of the above should be the answer.
Re: If a three-digit number formed with three nonzero digits is decreased
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25 Sep 2022, 12:50
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OE
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Let: h = hundreds' digit t = tens' digit u = units' digit Then: the three-digit number =100h + 10t + u the two-digit number is 10h + u Subtracting the latter from the former, the result is 90h + 10t = 10(9h + t). Since 9h + t has to be formed with nonzero values for h and t, the only impossible values for h and t is for the case of 180, where h = 2 and t = 0. All of the other cases give nonzero values for t. The answer is (D).