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  1. The expression 26n – 42n, where n is a natural number is always divisible by
    1. 15
    2. 18
    3. 36
    4. 48
Correct Option: D

The expression 26n − 42n = (26)n − (42)n
= 64n − 16n
which is divisible by 64 –16= 48
Therefore required answer is 48 .


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