What month of the year has 28 days?

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

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

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

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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

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

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?

What jumps when it walks and sits when it stands?