Playing With Numbers

13. Fatima wants to mail three parcels to three village schools. She finds that the postal charges are ₹20, ₹28 and ₹36, respectively. If she wants to buy stamps only of one denomination, what is the greatest denomination of stamps she must buy to mail the three parcels?

14. Three brands A, B and C of biscuits are available in packets of 12, 15 and 21 biscuits respectively. If a shopkeeper wants to buy an equal number of biscuits, of each brand, what is the minimum number of packets of each brand, he should buy?

15. A box contains 5 strips having 12 capsules of 500mg medicine in each capsule. Find the total weight in grams of medicine in 32 such boxes.

16. Determine the least number which when divided by 3, 4 and 5 leaves remainder 2 in each case.

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