Question Which of the numbers below can’t you get by changing some of the + to -? 2 + 4 + 6 + 8 = 20   -8 0 6 8

Question After a square is placed on the third scale, which side of the scale is heavier?   The left side The right side The

Question In New Math City (NMC), streets follow a square grid with integer coordinates, and all distances are measured in terms of

Question Which side of the last scale is heavier?   The left-hand side The right-hand side The scale is balanced We don&#8217

Question Rekha connected three identical bulbs and a battery as in the picture.   How can Rekha increase the total brightness

Question Some railroad tracks are made of 20-meter-long metal rails bolted together by metal plates. The quintessential “cli

Question In circle puzzles, dashed arrows indicate addition while solid arrows indicate multiplication. Which number will replace

Question In the following two puzzles, you can change some of the addition signs to subtraction, multiplication, division, and con

Question A fair die with 20 faces has each side labeled with a number from 1 through 10, with some labels appearing multiple times

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