512, or 4 x 4 x 4 x 4 x 2
8
1 x 8, 2 x 4 = 8
-4 x -4 = +16 = 16 -4 + -4 = -8
4 = 12 / 3 therefore 8-x must equal 3, so x has to equal 5.
1 x 8, 2 x 4.
2 x 4 x 8 x 10 is equal to 640.
32
1, 2, 4, 8: 1 x 8, 2 x 4.
2 x 2 = 4 8 x 0.5 = 4
9x + 4 - x + 8 = 8x + 12
The correct answer is 32. See: 1 x 8 = 8 2 x 8 = 16 3 x 8 = 24 4 x 8 = 32