Why is Saturday stronger than Monday?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

What is the riddle which can be asked all day with a different correct answer each time.

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

Prove that twice of ten is the same as twice of eleven.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Imagine you are in a room with no windows or doors. How will you get out?

What am I?