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?

Can you count the number of triangles in the given picture?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

What has no start, end, or centre?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

No matter how little or how much you use me, you change me every month. What am I?