In the image below, can you find the value of an angle(y)

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

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

People make me, save me, change me, raise me. What am I?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

I am sure no one can have two things for dinner. what are they?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What is the next number in the series?

15 29 56 108 208 ?