Monday, 19 December 2011

Numbers –24 (CAT-2005)

The right most non zero digit of the number 302720 is?
(1)1     (2)3     (3)7     (4)9

Solution follows here:
Solution:
302720 = 32720 * 102720 
The right most non-zero digit of the product is nothing but the right most digit of 32720, which can be found out easily for the concept on “unit digit pattern of exponents”
Answer (1)

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