If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

what does this picture(rebus) riddle means ?

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?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.