What goes up but never comes down?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

I have eight fingers and two thumbs but I do not live. What Am I?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Can you count the number of children in the picture below

What has many keys but can’t open a single lock?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

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?