allery7^25 નો એકમ અંક શું છે?
A1
B3
C7
D9
Answer & Solution
Correct answer: C. 7
7^n ચક્રના એકમ અંકો: 7, 9, 3, 1, 7, 9, 3, 1... (કાળ 4).
25 મોડ 4 = 1, તેથી એકમ અંક 7^1 = 7 સાથે મેળ ખાય છે.
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