Thailand 1st Elementary Mathematics

thailand math contest

1. M sold some apples and received an amount of money. If M had sold 10 more apples for the same amount of money, the price of one apple would be 2 baht less than the original price. If M had sold 10 less apples for the same amount of money, the price of one apple would be 4 baht more than the original price. (Note: Baht is the Thai Currency)
a) How many apples did M sell ?
b) What was the price of one apple?

2. Bag A has twice the number of beads in bag B. 12% of beads in bag A are removed and transferred to bag C. 20% of beads in bag B are removed and transferred to bag C. After removing and transferring beads, there are now 488 beads in bag C which is 22% more than the original number of beads in bag C. How many beads were there in the bag A at the beginning?

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