You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

You bought me for dinner but never eat me. What am I?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Why did the Girl throw the butter out of the window?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

I know a nine-letter word having only one vowel.
Do you ?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Prove that the below maths equation is true.

8 + 8 = 91

What country can make you shiver?