1x210 2x105 3x70 5x42 6x35 7x30 10x21 14x15 These all equal 210
That's easy, just half it. 420 divided by 2 (5 is half of 10) which equals 210. (1) To check my answer, I did... 42 x5 (5 x 2=10 (carry the one), then 5 x 4=20 + 1= 120) ---- 210
1x210 2x105 3x70 5x42 6x35 7x30 10x21 14x15 These all equal 210
210 is a composite number. The factor pairs for 210 are: 1x210 2x105 3x70 5x42 6x35 7x30 10x21 14x15
That's easy, just half it. 420 divided by 2 (5 is half of 10) which equals 210. (1) To check my answer, I did... 42 x5 (5 x 2=10 (carry the one), then 5 x 4=20 + 1= 120) ---- 210