Draw a square then draw a square on each of its sides. Which 5 different numbers from 0 to 9 can be put in the squares so that the 4 outside numbers add up to the middle number?
0,1,2,3 & 6 in the middle = 0+1+2+3 = 6 OR 0,2,3,4 & 9 in the middle = 0+2+3+4 = 9 OR 0,1,3,4 & 8 in the middle = 0+1+3+4 = 8 OR 0,2,1,4 & 7 in the middle = 0+2+1+4 = 7.
A square is in the first quadrant, as shown, with its sides extending to points on the x-axis of (3, 0), (5, 0), (7, 0) and (13, 0). What is the area of the square?
Put numbers 7, 8 and 9 at the corners of a triangle. Now place 1, 2, 3, 4, 5, 6 in twos on each side to make the same total on all three sides (include the numbers at the corners)?
Draw a clock face with the numbers 1 to 12 in their usual positions. Can you draw a line so that the numbers on one side of it add up to five times the numbers on the other side?
There is a 5×5 grid in front of you. You have to fill 25 squares with only 0 and 1. But, every neighboring square's number's product has to be 0. How many possible grids there are?
Arrange all the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 to give four different square numbers. (You make a square number when you multiply something by itself, so 49 is square because it is 7 times 7)
