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

It belongs to you, but other people use it more than you do. What is it?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Why do you find that most of the buildings are deprived of the 13th floor?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

What time is it when an elephant sits on a fence?

What does below rebus means ?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?