O_er_t_o_

Complete the missing letters of the given word.

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?

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

How many times can you subtract the number 5 from 25?

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.

Can you find the missing piece of the Porsche?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?