A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

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.

Can you count the number of triangles in the given figure?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

What part of the chicken has the most feathers?