A merchant has 120 litres of oil of one kind, 180 litres of another kind and 240 litres of third kind. He wants to sell the oil by filling the three kinds of oil in tins of equal capacity. What should be the greatest capacity of such a tin?

A man sells a radio-set for Rs 605 and gains 10%. At what price should he sell another radio of the same kind, in order to gain 16% ?

A wholesaler has three variants of rice. He has 138kg of Grade 1, 222kg of Grade 2 and 252kg of Grade 3 variety. He wants to pack the rice in bags in such a way that all bags have equal amount of rice and one bag will have only one kind of rice. If he wants to pack the maximum amount of rice in each bag.. how many bags in all will he need?