Question

A boy saves $Rs.5.75$. The least number of days in which he will be able to save an exact number of rupees, is

• A. $6$ days
• B. $8$ days
• C. $2$ days
• D. $4$ days

Answer 1

The correct option is D

$4$ days

Explanation for the correct option:

Convert Rs. to Paise

$Rs.5.75=575Paise$

The exact number of Rs. will be a multiple of $100$

LCM of $575and100$

$575=5\times 5\times 23$

$100=2\times 2\times 5\times 5$

LCM of $575and100$$=2\times 2\times 5\times 5\times 23=2300$

So, the boy save $2300Paise$

$\therefore$Number of days required = $\frac{2300}{575}$$=4days$

Hence, the least number of days in which he will be able to save an exact number of rupees is $4days$.