Spot the cat in the picture below

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

Can you find out the total number of triangles in the given figure?

What is the fastest way to double your money?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

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?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A man dies of old age on his 25 birthday. How is this possible?