2024 · Q26
The expression 555⁷⁷⁷ + 777⁵⁵⁵ is divisible by which of the following? 1. 2 2. 3 3. 37 Select the correct answer using the code given below:
Elementary MathematicsNumber System
- A1 and 2 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Explanation
Both terms are odd, so their sum is even (divisible by 2). Both are multiples of 3 and of 37 (555 = 15 × 37, 777 = 21 × 37), so the sum is divisible by 3 and 37 as well. All three statements hold: option (d).