204
1x192 2x96 3x64 4x48 6x34 8x24 12x16 I'm thinking you are factoring and intended to say added together. 12 and -16 will give you -192 and when added will be -4.
To work this out, you first have to give the numbers as their prime factors: 6 = 2x3 34 = 2x17 The next step is to identify the HCF. In this case, the HCF is 2. Finally, you multiply the numbers together and divide by the HCF: 6x34/2 = 102
45 * 1 = 45 45 * 2 = 90 45 * 3 = 135 45 * 4 = 180 45 * 5 = 225 45 * 6 = 270 45 * 7 = 315 45 * 8 = 360 45 * 9 = 405 45 * 10 = 450 45 * 11 = 495 45 * 12 = 540