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

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

Replace the question mark with the correct number in below Picture:

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

The cream is heavier than Milk. True or False?

What is the next number in this series?

4,12,84,3612....

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?