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

What type of tree can I carry in my hand?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

What happened when the wheel was invented?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

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