how to find the greatest common factor of 245,455, and 637?
回答 (5)
2009-06-20 3:12 pm
✔ 最佳答案
Find the prime factors first.245: 5×7×7
455: 5×7×13
637: 7×7×13
Answer: 7
2009-06-20 3:11 pm
first find prime factorisations
245=5*7^2
455=5*7*13
637=7^2*13
so the gcf of these three numbers is 7.
245=5*7^2
455=5*7*13
637=7^2*13
so the gcf of these three numbers is 7.
2009-06-20 4:46 pm
245 = 5 x 7 x 7
455 = 5 x 7 .....x 13
637 = .....7 x 7 x 13
---------------------------------------------
......= .....7
455 = 5 x 7 .....x 13
637 = .....7 x 7 x 13
---------------------------------------------
......= .....7
2009-06-20 3:21 pm
gcf is 7
2009-06-20 3:10 pm
245=5.7^2
455=5.7.13
637=7^2.13
gcf(245,455,637)=7
455=5.7.13
637=7^2.13
gcf(245,455,637)=7
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