Can you solve the alien pyramid riddle? - Henri Picciotto
Can you solve the prisoner hat riddle? - Alex Gendler
Can you solve the control room riddle? - Dennis Shasha
Can you solve the three gods riddle? - Alex Gendler
Can you solve the alien probe riddle? - Dan Finkel
Can you solve the temple riddle? - Dennis E. Shasha
Can you solve the dark matter fuel riddle? - Dan Finkel
Can you solve the bridge riddle? - Alex Gendler
Can you solve the fortress riddle? - Henri Picciotto
Can you solve the fantasy election riddle? - Dennis E. Shasha
Can you solve the human cannonball riddle? - Alex Rosenthal
Can you solve the secret assassin society riddle? - Alex Rosenthal
Can you solve the demon dance party riddle? - Edwin Meyer
Can you solve the rogue submarine riddle? - Alex Rosenthal
Can you solve the computer virus riddle? - James Tanton
Can you solve the giant spider riddle? - Dan Finkel
Can you solve the cursed dice riddle? - Dan Finkel
Can YOU solve the Pyramid Jump Riddle?
Can you solve the monster duel riddle? - Alex Gendler
Can you solve the Big Bang riddle? - James Tanton