Can you fill the blank with the correct number?

6 30 870 756030 _____

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Solve the puzzle by telling what does below picture means.

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

Why is it against the law for a man living in Delhi to be buried in Mumbai?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Move three sticks of the spiral below to form a square.

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?