Can you solve the below tricky visual equation?

Can you solve this picture maths equation?

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?

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

Can you identify the hidden rebus in the image below?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?