What is more useful when it is broken?

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

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

In the given picture, in how many ways can you read the word "Tiger"?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

I am quite hot but become too cold if you remove the first two letters. What am I?