Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

With the following rules:

(A) White can make up to 10 legitimate moves until all kings are checkmate.
(B) White can take any black piece except the king.
(C) The White King cannot be in check position at any time of the game.

Can you checkmate all kings in less than 10 moves?

What Does this text mean:

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What number do you get when you multiply all of the numbers on a telephone's number pad?

What is the next number in this matchsticks series riddle?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

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?

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

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

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?