Can you solve this picture maths equation?

What type of tree can I carry in my hand?

How many letters are in the alphabet?

How many triangles are there in the picture below?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Can you Find and name the hidden bird in the picture below ?

Can you find the thief by just looking at the picture below?

The dirtier I get, the whiter I look. Who am I?

Can you replace the question mark with the correct number in the below table sequence?