230
If you press start on the bottom left hand corner of your computer screen, then go to accessories, there is usually a calculator there.
20 + 78 = 98
37 plus 98 equals 135.
196
98 plus 65 equals 163.
6
34 + 98 + 98 + 87 + 32 = 349
2 + 98 = 100
410
44
294
562
The HCF of 78, 98 and 168 is 2.