What has many keys but can’t open a single lock?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What jumps when it walks and sits when it stands?

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?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

Can you write down eight eights so that they add up to one thousand?