The challenge is to find the values of the variables if you are to solve this Sudoku.
According to Plutarch, the Greeks found all the rectangles with integer sides, whose areas are equal to their perimeters. Can you find them? What rectangular boxes, with integer sides, have. . . .
A bag contains 12 marbles. There are more red than green but green and blue together exceed the reds. The total of yellow and green marbles is more than the total of red and blue. How many of. . . .
Christmas trees are planted in a rectangular array. Which is the taller tree, A or B?