Easy brain teasers and puzzles
Move exactly 1 match to make this a valid equation.
Bonus: find two different ways to solve this.
In matchstick math puzzles, you are not allowed to make an inequality symbol such as ≠, ≥, >, <, or ≤. That would make it too easy!
Continue reading “Matchstick Math 1”In the pulley puzzle diagram below, there is a pulley attached to a scale. One side of the pulley is attached to a weight and the other side is attached to the ground.
If the scale reads 100g, does the weight weigh 50g, 100g, or 200g?
Assume the pulley and rope has no weight (the scale is already adjusted to account for these), and that the whole system is in equilibrium (nothing is moving).
Note: this puzzle is best solved with a bit of basic physics knowledge, but there is also an intuitive solution, so give it a shot.
Continue reading “Pulley Puzzle”You see four cards with A, D, 3, and 6 face-up. You know that each card has a letter on one side and a number on the other side.
You are told that cards with a vowel on one side must have an even number on the other side. Which cards do you need to turn over to test if this rule is broken?
View SolutionWhat common word or phrase is this rebus referring to?
NOONGOOD
Good afternoon
How many trailing zeros does 1000! have?
“!” is the factorial symbol. For example, 12! = 12 x 11 x 10 x … x 2 x 1 = 479001600, which has 2 trailing zeros (zeros at the end of the number).
Continue reading “Trailing Zeros”What common word or phrase is this rebus referring to?
LANG4UAGE
Foreign language (“four in language”)
What common word or phrase is this rebus referring to?
FLUBADENCE
Bad influence (“bad” in “fluence”)
Amy says Brad is lying.
Brad says Chris is lying.
Chris says both Amy and Brad are lying.
Who is lying? Who is telling the truth?
View SolutionWhite to play and mate in 3 – but white’s pieces must make exactly one move each!
You are in a city with streets on a perfect grid – every street is north-south or east-west. You are are driving north, and decide to randomly turn left or right with equal probability at the next 10 intersections.
After these 10 random turns, what is the probability you are still driving north?
View Solution