1) Ram purchased a radio set for Rs 300 and sold it to Shyam at a profit of 25%. Shyam sold it to Mohan at a loss of 10%. For how much did Mohan buy it?

2)2) Rajeshwar bought 16 dozen ball-point pens and sold them by and by. Due to a calculation mistake in fixing selling price, he lost an amount equal to SP of 4 dozen pens. Find the loss per cent. Find the SP of one dozen pens, if he purchased these 16 dozen pens for Rs 240.

3) A man bought a tonga and a horse for Rs 7500. He sold the tonga at 11% profit and the horse at 26% profit, making 19% profit on the whole. Find the cost price of the tonga and the horse separately.

4) If 12 men and 16 boys can do a piece of work in 5 days and 13 men and 24 boys can do it in 4 days, compare the daily work done by a man with that done by a boy.

5) In how many ways can 5 letters be posted in 4 letter boxes?

6) How many words can be formed with the letters of the word ‘ORDINATE’ so that vowels occupy odd places?

7) How many numbers between 400 and 1000 can be formed with the digits 0, 2, 3, 4, 5, 6 if no digits is repeated in the same number?

8) Find the number of ways in which 8 different flowers can be strung to form a garland so that 4 particular flowers are never separated.

9) A trader marks his goods at 20% above the cost price. If he allows a discount of 5% for cash payment, what profit per cent does he make?

10) A dealer bought a horse at 20% discount on its original price. He sold it at a 40% increase on the original price. What percentage of profit did he get?