Can you find out who is the kidnapper in below Picture and why, Explain ?

A research team went to a village somewhere between the jungles of Africa. Luckily for them, they reached the day when quite an interesting custom was to be performed. The custom was performed once a year as they confirmed and was performed in order to collect the taxes from every male of the region.

The taxes were to be paid in the form of grains. Everyone must pay pounds of grain equaling his respective age. This means a 20-year-old will have to pay 20 pounds of grain and a 30-year-old will pay 30 pounds of grain and so on.

The chief who collects the tax has 7 weights and a large 2-pan scale to weigh. But there is another custom that the chief can weigh only three of the seven weights.

Can you find out the weights of the seven weights? Also, what is the maximum age of the man that can be weighed for the payment of taxes?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

How many sides does a circle have?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?