Brain Teaser

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

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

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

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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

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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

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

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

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Question The green, leaf-shaped area shown is the region of overlap between two circles of radius 2 that are centered, respectivel

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Question A rectangle is inscribed in a right triangle. What is the area of the orange rectangle? 27 30 35 36 The area cannot be de

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Question You need to make one liter of 60% alcohol solution, but you only have 30% and 70%. How much of the 70% solution do you ne

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Question Mei and Yuri are playing a subtraction game, with the following rules: Together, they select a positive integer N. The fi

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Question In the candy-making process, sugars like glucose and sucrose transform in a process called caramelization to make harder,

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