Posted by **Mary** on Tuesday, March 19, 2013 at 10:15am.

Find the HCF

1) 7x and 9 : nothing

2) x^2(x-4) and x(x-4) : its (x-4)?

3) 6b and 2b^3 : 2b ,?

4) 6(x-1)^2 and 16(x-7)(x-1) : x-1 ,

5) 18y,27y, 9xy^2 : 9y

6) 5a^2 and 25a : 5a

7) 6abc, 8ab, 12bc : 2b

8) 9a^2b and 18ab^2 : 9ab

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