2014 · Q19
Consider all those two-digit positive integers less than 50, which when divided by 4 yield unity as remainder. What is their sum?
Elementary MathematicsNumber System
- A310
- B314
- C318
- D323
Explanation
They are 13, 17, …, 49: 10 terms with sum (10/2)(13 + 49) = 310.