Do any five sums to find HCF and LCM by prime factorisation.(i) two numbers of 2-digit 3 sums .(ii) three numbers 2-digit 2 sums
Answers
Answered by
1
1)HCF of 20,28,36
20=2*2*5
28=2*2*7
36=2*2*3*3
The common factor of 20,28,36 is 2 (occuring twice). Thus HCF of 20,28,36 is 2*2=4
LCM
4: 20,28,36
5: 5 , 7 , 9
7: 1 , 7, 9
9: 1 , 1 , 9
1, 1, 1
LCM= 4*5*7*9*1*1*1=1260
20=2*2*5
28=2*2*7
36=2*2*3*3
The common factor of 20,28,36 is 2 (occuring twice). Thus HCF of 20,28,36 is 2*2=4
LCM
4: 20,28,36
5: 5 , 7 , 9
7: 1 , 7, 9
9: 1 , 1 , 9
1, 1, 1
LCM= 4*5*7*9*1*1*1=1260
Similar questions