Can you place six X (crosses) in below board without making three in a row in any way ?

A father's child, a mother's child, yet no one's son.

Who am I?

what one word does the below rebus identifies?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Find the missing letter in the last circle logically in the given below picture.

What has a ring but no finger?

I am an odd number. Take away a letter and I become even. What number am I?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?