Question What is the measure of the missing angle? 10∘ 15∘ 20∘ 25∘ Like these puzzles? For a limited time, MIT alumni and

Question A geomagic square is a square grid with a shape in each cell such that the shapes of each row, column, and diagonal can b

Question Suppose we have two jars of candies: jar A has 400 red candies and jar B has 200 green candies. We then perform the follo

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

Question Which triangle has an area of 1? A B C D E Like these puzzles? For a limited time, MIT alumni and friends can get 20% off

Question The neuron below has 4 inputs: two positive (green) and two negative (pink). We can make different logic gates by using d

Question What is the sum of the measures of the three pink angles, ∠A+∠B+∠C? 90∘ 100∘ 110∘ 120∘ Like these puzzles?

Question In a circle puzzle, dashed arrows mean to add and solid arrows mean to multiply. Only integers are allowed. What number g

Question Which of these can be formed by taking cross-sections of a donut (torus) like the one shown? Select one or more: A B C D

Question The length of all the blue segments is 5. The length of all the yellow segments is 6. The length of all the orange segmen

Question The cards shown have colored hearts, numbers, or letters printed on them on either side. How many cards need to be turned

Question Here is an algorithm to check whether a sequence is already sorted (it is not a sorting algorithm): Starting from the lef