Denominator of a number is 4 less than its numerator. If 6 is added to the numerator it becomes thrice the demoninator. Find the fraction.

A lady went to a bank with Rs. 1.00.000. She asked the cashier to give her Rs. 500 and Rs. 1,000 currency notes in return. She got 175 currency notes in all. Find the number of each kind of currency notes.

There are 40 passengers in a bus, some with Rs. 3 tickets and remaining with Rs. 10 tickets. The total collection from these passengers is Rs, 295. Find how many passengers have tickets worth Rs. 3?

An employee works in a company on a contract of 430 days on the condition that he will receive Rs. 120 for each day he works and he will be fined Rs. 10 for each day he is absent. If he receives Rs. 2300 in all, for how many days did he remain absent?

Jusum buys some chocolates at the rate of Rs. 10 per chocolate. She also buys an equal number of candies at the rate of 5 per candy. She makes a 20% profit on chocolates and 8% profit on candies. At the end of the day, all chocolates and candies are sold out and her profit is Rs. 240. Find the number of chocolates purchased.