How many times can you subtract the number two from the number fifty?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

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

I am white when I am dirty, and black when I am clean. What am I?

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?

If six children and two dogs were under an umbrella, how come none of them got wet?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

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