Question How many four-digit numbers can we create by rearranging digits of 2021? All four of the digits must be used exactly once

Question You drop a stack of three balls. The bottom ball is the heaviest, with the middle ball much lighter and the top ball much

Question Jaz makes circular necklaces by stringing black and gold beads together. She wants to count how many different necklaces

Question At a university, the portraits of its 50 presidents line a hallway of the student center. Every year, 50 students pull th

Question Your goal is to measure out 7 liters of water. You have one empty 12-liter container, and you may choose one other contai

Question There are x regular polygons, all with n sides of length 1 arranged in a row as the triangles, squares, and pentagons are

Question In a grassy field, a goat is tethered by a rope with length 6 to the corner of a rectangular shed with side lengths 4 and

Question Look at the program above:   Imagine running this program 21 times, with each of the integers from -10 to 10 as the

Question Only one-digit numbers can start with a zero. If every letter corresponds to a different digit, what is A+B+C+D? 5 9 19 2

Question The mobile shown is balanced. Karen is quite happy with her perfectly balanced mobile.   Karen’s friend Juli i

Question The yellow pentagon is inside of a rectangle. What is the yellow-shaded area? 52 68 72 74 80

Question The outer figure is a square and the line from each vertex bisects its opposite side. What is the area of the central whi