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the tens’ digit

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the tens’ digit

by sanju09 » Tue May 18, 2010 5:13 am
What is the tens' digit of positive integer K?
(1) K divided by 100 has a remainder of 30.
(2) K divided by 110 has a remainder of 30.
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by dkumar.83 » Tue May 18, 2010 5:40 am
Hi Sanju,

The answer should be A.

1. Any number divided by 100 leaves the remainder which is the last 2 digit of those no. e.g 167, 267, 367 divided by 100, remainder is 67. Ten's digit is 6.

2. 110. By plugging its tough to find one answer. 140 , 250, 360 all divided by 110 gives 30 as remainer.
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