Find out the missing number in the picture attached:

If eleven plus two equals one, what does nine plus five equal?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

I’m tall when I’m young, and I’m short when I’m old. What am I?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you count the number of lines in the below picture?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?