The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

A pregnant woman is preparing to name her seventh child. Her children's names so far are Dominique, Regis, Michelle, Fawn, Sophie, and Lara. What will she name her next child -- Jessica, Katie, Abby or Tilly?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Can you spot the hidden girl in the picture below?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

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

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

John's five friends Rachel, Jacob, Phoebe, Joey and Chandler live on the same road.

Rachel lives in the house: A, Jacob lives in the house: B, Phoebe lives in the house: C, Joey lives in the house:D, Chandler lives in the house: E

Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E

The road numbers run from 2 to 222.

Can you tell me the house number of each of John's friends?