Draw five squares joined in the shape of a plus. Place distinct digits (other than 0 or 1) so that the three numbers in the vertical line multiply together to give the same answer as the three numbers in the horizontal line multiplied together?
Find three number such that?
625 is a square number because it is 25 times 25 (a number times itself). Find two square numbers, each of which uses all three digits 1, 9 and 6.
There are four solutions.
64 numbers (not necessarily distinct) are placed on the squares of a chessboard such that the sum of the numbers in every 2x2 square is 7.
What is the sum of the four numbers in the corners of the board?
