John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

What is the end of everything?

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.

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 ()

What does this Rebus Picture mean?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Can you place three balls such that the equation shown in the picture holds true?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?