2013 · Q16
19^5 + 21^5 is divisible by
Elementary MathematicsNumber System
- A10 only
- B20 only
- Cboth 10 and 20
- Dneither 10 nor 20
Explanation
a^5+b^5 divisible by a+b=40 → by 10 and 20. Answer C.
19^5 + 21^5 is divisible by
Explanation
a^5+b^5 divisible by a+b=40 → by 10 and 20. Answer C.