What word begins and ends with an E, but has only one letter?

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?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

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

The more you take me, the more you leave me behind.
Who Am I?

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Why 1729 is a magic number? Answer Logically.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?