Han Muyuan Alex's answer to Sayf Ahmad's Secondary 1 Maths Singapore question.
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By separating the the numbers into their primes, you are able to find the largest common factor:
a) 6= 1x2x3 35= 1x5x7 Hence the highest common factor is 1
b) 98= 1x2x7x7 112= 1x2x2x2x2x7 Hence the highest common factor is 2x7=14
c) 117= 1x3x3x13 195= 1x3x13x5 Hence highest common factor is 3x13=39
d) 245= 1x5x7x7 392= 1x2x2x2x7x7
Hence highest common factor us 7x7=49
a) 6= 1x2x3 35= 1x5x7 Hence the highest common factor is 1
b) 98= 1x2x7x7 112= 1x2x2x2x2x7 Hence the highest common factor is 2x7=14
c) 117= 1x3x3x13 195= 1x3x13x5 Hence highest common factor is 3x13=39
d) 245= 1x5x7x7 392= 1x2x2x2x7x7
Hence highest common factor us 7x7=49
Date Posted:
1 year ago
Thanks soooo much
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