Playing With Numbers

17. A merchant has 120 litres of oil of one kind, 180 litres of another kind and 240 litres of a 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?

18. Find a 4-digit odd number using each of the digits 1, 2, 4 and 5 only once such that when the first and the last digits are interchanged, it is divisible by 4.

19. A loading tempo can carry 482 boxes of biscuits weighing 15 kg each, whereas a van can carry 518 boxes each of the same weight. Find the total weight that can be carried by both the vehicles.

20. In the marriage of her daughter, Leela spent ₹216766 on food and decoration,₹122322 on jewellery, ₹88234 on furniture and ₹26780 on kitchen items. Find the total amount spent by her on the above items.

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