What is the Surname of Barbie Doll?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

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?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Out of four images which one is the odd one out?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?