1.Choose the word opposite in meaning to the given word. Lunacy

2.A leak can empty A full tank in 12 minutes.If the leak is absent,two pipes A and B can fill the tank separately in 15 minutes and 20 minutes respectively.If the leak is active and both the pipes are open,then the tank will be filled in

3.In a football tournament there are 500 teams .Each team plays with every other team exactly once.How many matches will have to be organised ?

4.A Number is divisible by 6 but not divisible by 4,which of the following will not be an integer ?

5.A retailer buys a sewing machine at a discount of 15% and sell it for Rs 1955.Thus he makes a profit of 15 %.The discount is