I am sure no one can have two things for dinner. what are they?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Who can jump higher than a Mountain?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you start the fire using two pieces of wood?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

Rearrange the letters in "new door" to make one word.

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

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