Can you find out which number multiplied by itself will give the output as 12345678987654321?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

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.

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?