15 stamps of equal value cost Rs.18.00.How many staps of the same value can be bought for Rs.36?

Cost of 105 envelopes is Rs.35.How many envelopes can be bought for Rs.10?

If 5 items cost Rs a then _______ items can be bought for Rs b.

Refer to the graph given in fig. How much petrol can be bought for Rs.600?

Two schools P and Q want to award their selected students on the values of Discipline. Politeness and Punctuality. The school P wants to award Rs x each, Rs y each and Rs z each for the three respective values to its 3,2, and 1 students with a total award money of Rs 1000. School Q wants to spend Rs 1500 to award its 4, 1 and 3 students on the respective values (by giving the same award money for the three values as by school P). If the total amount of award for one prize on each value is Rs. 600. using matrices, find the award money for each value. Apart from above three values, suggest one value of awards.

Given three resistors of different values. How many different combination of these three resistance can be made ?

Cost of 4 dozens of banana is Rs.60.How many bananas can be purchased for Rs.12.50.

Two schools A and B want to award their selected students on the values of sincerity, truthfulness and helpfulness. The school A wants to award Rs. X and Rs y each and Rs Z each of the three respective values to 3,2 and 1 students respectively with a total award money of Rs 1600. School B wants to spend Rs 2300 to award its 4,1 and 3 students on respective values (b giving the same award money for the three values as before). If the total amount of award for one prize on each value is Rs 900 , using matrices find the award money for each value. Apart from these three values, suggest one more value which should be considered for award.

A TV was bought at a price of Rs 21,000. After one year the value of the TV was depreciated by 5% (Depreciation means reduction of value due to use and age of the item). Find the value of the TV after one year.