what does this below rebus represent identXQQQQQME

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

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

What has many keys but can’t open a single lock?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Find the smallest sentence with all the English alphabet.

A couple went to a hill station to enjoy their vacation. They have 12 sons, and each has a wife who has 3 sons further.

How many people went to the hill station?

Find the missing number in the series below

13 -21 34 -55 ? -144

Count the number of triangles in the below picture?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?