It's the sum of 42 and 13 which is 55.
42 + 6 = 48.
14 and 21 have a sum of 35 and an LCM of 42
The sum of 15 and 27 is 42.
Hint: review your multiplication table-- does not 42 ring a bell? What times what makes 42? Is their sum 13? ?? bingo!!
The sum of 21 and 21 is 42.
42
42
-12.
13+14+15 = 42
There are 3 whose sum is 45 whose sum is 57 whose sum is 69 whose sum is 711 whose sum is 813 whose sum is 915 whose sum is 1017 whose sum is 1119 whose sum is 1219 whose sum is 1317 whose sum is 1415 whose sum is 1513 whose sum is 1611 whose sum is 179 whose sum is 187 whose sum is 195 whose sum is 203 whose sum is 211 whose sum is 22.
54