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

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

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

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

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

Cost of 5kg of wheat is Rs.30.50. What quantity of wheat can be purchased in Rs.61?

Six cards and six envelopes are numbered 1, 2, 3, 4, 5, 6 and cards are to be placed in envelopes so that each envelope contains exactly one card and no card is placed in the envelope bearing the same number and moreover cards numbered 1 is always placed in envelope numbered 2. Then the number of ways it can be done is a. 264 b. 265 c. 53 d. 67