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?

Different lights make me strange by changing me into different sizes. What am I?

Find the next number in the series below.

6 18 270 72090 ?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Three people check into a hotel. They pay $60 for the rent of the room. After they check-in, the manager realize that the rent for the room is $55. So, he gives $5 to the bellboy and asks him to give it to them. The bellboy thinks that it will be difficult for the three people to share $5 among them and seeking the personal benefit, he pockets $2 and gives the remaining $3 to them.

Now, each person paid $20 and got back $1. In this manner, each of them paid just $19 which totals to the amount of $57. The bellboy has $2 with him and adding them, we get $59. So where is the remaining $1?

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Which digit occurred maximum times between the number 1 and 1000?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

How can you make number one disappear by adding something to it?