QNR 5. Kavi fires three arrows. Each one hits a scoring ring. Which one of the following total is not possible?
1) 17
2) 18
3) 21
4) 22
Ans:- This is a simple question; faster way to solve this should be to observe the options:
17 = 4 + 4 + 9
21 = 18 + 3 = 3 + 9 + 9
22= 18 + 4 = 4 + 9 + 9
Only 18 cannot be put as possible sum of any combination. Option 2.