Find out the missing number in the picture attached:

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?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

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.

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?

What do you call a fish without an eye?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?