A six digit number is formed by writing a three digit number two times consecutively. Find the least four digit number which can exactly divide this type of six digit number.

Interest earned by Ramesh on Rs.10,000 for 2 years at R% p.a. simple interest is how much more/less than interest earned by him on Rs. 8000 for 2 years at (R+10)% p.a. compounding annually. If Rs. 2000 is invested at 2R% p.a. simple interest for a year, then it would fetch an interest of Rs.400.

Ramesh can do a work in 21 days and Mahesh in 42 days. If they work on it together for 7 days, then what fraction of work is left?

A and B invest in a business in the ratio 3:2. If 5% of the total profit goes to charity and A’s share is Rs.855, the total profit is:

The difference between the simple interest between the simple interest received from two different sources on ₹ 1500 for 3 years is ₹ 13.50. The difference between their rate of interest is - 

N is the smallest three digit prime number. When N is divided by 13, then what will be the remainder?