What number when divided in half becomes zero?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

They are three errirs in this question. Can you find them?

Can you name an animal whose killing cannot be performed without spilling your own blood?

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 Watermelons are there in the below picture?