Why is Saturday stronger than Monday?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You can see it everyday, But cannot touch it at will. What is it?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

The more of this there is, the less you see. What is it?