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Q3 DIGIT PROPERTIES

The right most non zero digits in the number 30^2720 is

a.1
b.3
c.7
d.9

The right most non-zero digit can be found using pattern method.

301 = 3

302 = 9

303 = 7

304 = 1 

The pattern repeats from here. Since 2720/4 gives the remainder 0, right most non-zero digit will be 1

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