What always comes into a house through the keyhole?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

In a town, there are over 100 flats.
Flat-1 is named first flat.
Flat-2 is named second flat.
Flat-3 is named third flat.

A visitors 'Victor' decides to walk through all the flats, he finds all the flats except flat-62.
Victor later founds that the local of the town have given it another name.

What is the name of the Flat?

I have eight fingers and two thumbs but I do not live. What Am I?

Can you count the number of blocks in the picture below?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

How could a baby fall out of a twenty-story building onto the ground and live?

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