1. Find the greatest number of four digits which must be added to 5,231 so that the final number becomes exactly divisible by 12, 15, 27, 32 and 40. (a) 7,729 (b) 7,829 (c) 7,929 (d) 9,729 2. Find the…

A number when divided by 6 leaves remainder 3. When the square of the same number is divided by 6,…

A retailer offers the following discount schemes for buyers on an article. I. Two successive discounts of 10%. II. A…

A certain sum of money triples itself in 5 years at simple interest. In how many years it will be…