I have branches, but no fruit, trunk or leaves. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Find the missing letter in the last circle logically in the given below picture.

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What runs around the whole yard without moving?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)