I am an odd number. Take away a letter and I become even. What number am I?

Solve the counting riddle by identifying the number of triangles in the given picture.

When can we add 2 to 11 and get 1 as the correct answer?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Which letter of the alphabet has the most water?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.