What is the word or phrase?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

You can see it everyday, But cannot touch it at will. What is it?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Who is that with a neck and no head, two arms and no hands? What is it?