What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

How can you take 2 from 5 and leave 4?

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?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Find the missing number in the sequence below:

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

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?

Can you replace the question mark with the correct number in the below table sequence?