There are five squares formed by 12 matchsticks as shown in the figure. Can you remove just two matchsticks so that only two squares remain?
Hard Riddles
Probability Other Child Is a Boy
Mr. Smith has two children. If the older child is a boy, what is the probability that the other child is also a boy?
Riddle AnswerThe Length of One Shoelace
The length of one shoelace is 20cm and half a shoelace.
What is the length of 2 such shoelaces?
Riddle Answer12 Marbles Problem
You have twelve marbles that are identical in size, shape, and color. One of the marbles is heavier in weight than the rest. How can you find the heavier marble by using a balance scale only thrice?
Riddle AnswerSliding Coins
Three pennies and three nickles are arranged in a row. The pennies are red and nickles are green in color. The goal is to move them so that the coins are again in a row, with all pennies to the right and nickels to the left.
Each move consists of moving a pair of adjacent coins, and sliding those two coins to a new position without rotating the coins. How can you achieve this (shown below) in three moves?
