Which of the following is a composite number, 31, 41, 51 and 61?

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2007-06-07 10:10:17 · 4 answers · asked by Kwame L 1 in Games & Recreation ➔ Card Games

2007-06-07 10:18:38 · answer #1 · answered by Anonymous · 0⤊ 0⤋

51 because it is divisible by three

51/3 = 17

2007-06-07 11:40:16 · answer #2 · answered by Timmy 1 · 0⤊ 0⤋

all

31: -31,-1,1,31
41: -41,-1,1,41
51: -51,-17,-3,-1,1,3,17,51
61: -61,-1,1,61

2007-06-10 08:26:58 · answer #3 · answered by Anonymous · 0⤊ 0⤋

51 is composite

31,41,61 are prime for their only factors are 1 and itself

2007-06-07 10:49:12 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋