Question

Find the HCF using the prime factorisation method. Check it again by the division method. 78,98. &. 32, 128, 272

Answer 1

78=2X3X13
98=2X7X7
HCF=2

98=78X1+20
78+20X3+18
20=18X1+2
18=2X9+0
therefore, HCF=2

32 = 2X2X2X2X2
128=2X2X2X2X2X2X2
272=2X2X2X2X17
HCF=2X2X2X2
=16

Answer 2

Answer:

128/32=4

272/32=16/32=2