Challenge your students with this set of 50 place value riddle cards for three-digit numbers! Suitable for high second through fourth graders, the riddles are solved using place value knowledge, algebraic thinking, and logical reasoning.
We are constantly on the hunt for sources of hard riddles to solve, with answers provided. If you are looking for ways to challenge your gray cells, or want to flummox your friends, here are some brain teasers.
To set up the treasure hunt, Preiss traveled to 12 locations in the US to secretly bury a dozen ceramic casques. Each casque contains a small key that could be redeemed for one of 12 jewels Preiss kept in a safe deposit box in New York. The key to finding