2016 · Q11
A boy saves Rs. 4.65 daily. What is the least number of days in which he will be able to save an exact number of rupees ?
Elementary MathematicsNumber System
- A10
- B20
- C21
- D25
Explanation
After n days he saves 4.65n = 93n/20 rupees. For this to be a whole number of rupees, 20 must divide n. The least such positive n is 20 (option B).