Question

Mahesh has certain number of problems with him. He can solve some fixed number of problem every hour. After solving for 5 hour, he left with 384 problems. If he had solved for 10 hours. He is left with 144 problems. Find number of problem with him initially

Answer 1

After 5 hrs of solving, 384 problems are left.

After 10 hrs of solving, 144 problems are left.

So, 384-144 problems are done in 10-5 hrs

i.e 240 problems in 5 hours

Since after 5 hrs; 384 problems are left;

Before 5 hrs number of problems initially are 384+240 = 624