What is the sum of the digits of the number ?

Answer and explanation

Correct answer: A.

  1. Step 1: .
  2. Step 2: This is , whose digits sum to .
Answer
.
Why not the others: is the power of in ; is the power of ; and do not come from the digits of .

Practise more Mathematical problem solving.

Free questions with an explanation for every one, and full timed TMUA mock tests.