2006-08-16 17:21:54 · 19 answers · asked by melmel_girl_11 2 in Science & Mathematics ➔ Mathematics
51 / 3 = 17
21 / 3 = 7
91 / 7 = 13
31 is prime.
2006-08-16 17:27:44 · answer #1 · answered by dennis_d_wurm 4 · 1⤊ 0⤋
C-31
2006-08-17 00:27:50 · answer #2 · answered by Anonymous · 1⤊ 0⤋
C-31
2006-08-17 00:32:57 · answer #3 · answered by Islandgahl 1 · 0⤊ 1⤋
31
2006-08-17 00:25:34 · answer #4 · answered by Anonymous · 0⤊ 1⤋
c 31
2006-08-17 00:29:57 · answer #5 · answered by ashley k 2 · 0⤊ 1⤋
C. 31
2006-08-17 02:51:57 · answer #6 · answered by ayie 2 · 0⤊ 0⤋
C- 31
2006-08-17 02:31:32 · answer #7 · answered by Markus G 1 · 0⤊ 0⤋
C - 31
2006-08-17 00:34:45 · answer #8 · answered by Ragazza 2 · 0⤊ 1⤋
31
51=3*17
21=3*7
91= 13*7
2006-08-17 00:26:06 · answer #9 · answered by robin 3 · 1⤊ 0⤋
answer C-31 is the prime number
2006-08-17 00:25:50 · answer #10 · answered by whatelks67 5 · 0⤊ 1⤋