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division multiplication

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division multiplication

by vaivish » Tue Aug 05, 2008 9:25 am
Of the 24 positive odd integers that is divisible by 5, 1/3 have tens' digit of 0, 1/3 have tens' digit of 1, and rest have tens' digit of 2. What is the tens digit of the sum of the 24 numbers?
(A) 2
(B) 4
(C) 5
(D) 6
(E) 9

OA is d
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by eccentric » Tue Aug 05, 2008 9:37 am
clue 1 --> 24 odd +ve integers 24 nos with 5 in unit place give us 12 as carry forward
clue2 --> 8 0s, 8 1s and 8 2s hence nos to add 8+6+2 which is 16 hence 6 is no on tens place.

Regards,
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by vaivish » Thu Aug 07, 2008 11:08 am
thanks
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