47⁴³ + 43⁴³ is divisible by?
- 45
- 60
- 90
- None of these
Explanation
Rule: If n is odd then a^n + b^n is divisible by a + b
Here n = 43 which is odd
a = 47 , b = 43
a + b = 47 + 43 = 90
So 47⁴³ + 43⁴³ is divisible by 90
Last verified on 12-08-2026
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