Below are 40 matchsticks arranged in a square grid.
What is the fewest number of matchsticks that need to be removed so that there are no squares (of any size) remaining?
Riddle AnswerBelow are 40 matchsticks arranged in a square grid.
What is the fewest number of matchsticks that need to be removed so that there are no squares (of any size) remaining?
Riddle AnswerA hospital has 16 isolation rooms. Each room has a patient with a different illness.
Patient in room 13 recovers and wants to say goodbye to each patient. The problem is that if he visits a patient twice, he becomes ill again.
How does he visit each patient only once and exit from room 4?
Riddle AnswerHow can you place the numbers 1 through 9 in a 3×3 grid such that every row, column, and the two diagonals all add up to 15?
There are 13 caves arranged in a circle. There is a thief hiding in one of the caves. Each day the thief can move to any one of the caves that is adjacent to the cave in which he was staying the previous day. And each day, two cops search any two caves of their choice for the thief. So, one cave is searched per cop per day.
The following conditions apply.
What is the minimum number of days to guarantee in which the cops can catch the thief?
Riddle Answer