Question

1) 1/6+1/66; 2) 1/6+1/14+1/21; 3) 1/8+1/52+1/104; 4) 1/66+1/198

Answer 1

1)1166+166=1266=211
2)742+342+242=1242=621=27
3)13104+2104+1104=16104=213
4)3198+1198=4198=299