allery7^25 ਦਾ ਯੂਨਿਟ ਅੰਕ ਕੀ ਹੈ?
A1
B3
C7
D9
Answer & Solution
Correct answer: C. 7
7^n ਚੱਕਰ ਦੇ ਇਕਾਈ ਅੰਕ: 7, 9, 3, 1, 7, 9, 3, 1... (ਪੀਰੀਅਡ 4)।
25 ਮਾਡ 4 = 1, ਇਸਲਈ ਯੂਨਿਟ ਅੰਕ 7^1 = 7 ਨਾਲ ਮੇਲ ਖਾਂਦਾ ਹੈ।
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