2 x 2 = 4 x 2 = 8 x 5 = 40 x 5 = 200... the other answer was wrong (too many 2s)
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2 x 2 x 2 x 3 x 5 x 5 600 = 15 x 40 = 3 x 5 x 5 x 8 = 3 x 5 x 5 x 2 x 4 = 3 x 5 x 5 x 2 x 2 x 2
300,000 = 1 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5 x 5 x 5 x 5
A question of prime factors... The answer is 2 x 2 x 3 x 5 x 7 = 420 2 x 2 x 3 x 5 x 7 gives us a factor of 2... 2 x 2 x 3 x 5 x 7 and of 3... 2 x 2 x 3 x 5 x 7 and of 4... 2 x 2 x 3 x 5 x 7 and of 5... 2 x 2 x 3 x 5 x 7 and of 6... 2 x 2 x 3 x 5 x 7 and of 7.
2 x 2 x 2 x 3 x 3 x 5 x 5 x 5
( x^2 - 25 ) = ( x + 5 ) ( x - 5 ) <--------------------------