Question You’ve just met Maria and Nuria, sisters of your friend Daria. You can’t remember if either of them lives wit

Question In the triangle shown, what is x?   30° 31° 32° 33°

Question Shown are two squares of the same size. They’ve each been divided into many smaller squares. Which of the two large

Question Which of these expressions is larger?   100! × 100! 99! × 101!

Question What is the minimum number of matchsticks that must be removed from this arrangement to leave exactly two squares?  

Question Which of these is the best fit to complete the pattern shown?  

Question Andrei and Cristina would like to drink some tea, but they don’t want to wait too long for it to cool down. They bo

Question A smartphone releases some energy as heat just as you do, but it has much less capacity to control its temperature: if a

Question What is the least number of guards needed to completely guard this gallery of bovine art?   The guards cannot move,

Question There are four people living in four differently colored houses, and every one of them has a different pet.   Annie

Question In this puzzle, is Jasper a human or a werewolf? Each of these three Londoners is either a human or a werewolf. Humans al

Question Nalani and Violet are treating themselves to ice cream at their favorite Jen & Berry’s. First, they choose one