Discussion

Explanation:

Using Fermat’s Little Theorem we know, remainder of a(p-1) when divided by p is 1.

where p is a prime number, a and p are co-primes.

Here, a = 2 and p = 7.

∴ Remainder when 26 is divided by 7 = 1.

⇒ R[2100/7] = R[26×16+4/7] = R[26/7]16 × R[24/7] = 116 × 2 = 2.

Hence, 2.

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