the answer is 31 and 47 make 78. 47+31=78
2, 3 and 13 are the only prime numbers that combine to make 78.
80
2x3x13=78
78
Prime factors of 78 are: 2, 3 and 13
78 two prime numbers..... dont know 77 and 1
2, 3 and 73
76 + 77 + 78 three numbers in a row
19+59 = 78
466uo
78