John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

Which point will the car reach to go out?

why number 8549176320 is one of a kind?

I have Rs.50 and I spend it in the way as below.

I am lying and I always lie. Tell me whether I am lying or telling the truth.

How can you make number one disappear by adding something to it?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Why do you find that most of the buildings are deprived of the 13th floor?

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?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?