15, 17, 19 and 21.
72, 72, and 72.
72 = 36 + 36
How about: 8*9 = 72
Three numbers that equal 72 are 24, 24, and 24. Another set of three numbers that equal 72 are 36, 18, and 18. Additionally, 8, 24, and 40 are another set of three numbers that equal 72.
145
99
67 and 5
24 & 3
-936
Not sure about 720 but if the answer were to be 72 then the two numbers are 8 and 9 8 x 9 = 72 8 + 9 = 17
3 x 3 x 8 equals 72