Why is Saturday stronger than Monday?

What does the below rebus riddle means?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

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

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What does an Island and the letter T have in common?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do 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?