What does below Rebus mean ?

esgg sgeg gegs gsge

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

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

You are on your way to visit your Friend, who lives at the end of the hill. It is his birthday, and you want to give him the cakes you have made. Between your house and his house, you have to cross 5 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake. How many cakes do you have to leave home to make sure that you arrive at a friend's house with exactly two

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

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

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?