What has lots of eyes, but can’t see?

When can we add 2 to 11 and get 1 as the correct answer?

What is the word or phrase below?
R | E | A | D

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

How can you make a TV, a bed, a dog, and a car liquid?

Can it be possible to build a house that has all its four walls facing towards the South?

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).

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?