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?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

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

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

How many letters are in the alphabet?