Answer:
9
Step-by-step explanation:
This method uses only subtraction to find the HCF
• Subtract smaller number from larger number
• Repeat this until a common value is obtained
• The common value is the HCF
Given 900 and 243, then
900 - 243 = 657
657 - 243 = 414
414 - 243 = 171
243 - 171 = 72
171 - 72 = 99
99 - 72 = 27
72 - 27 = 45
45 - 27 = 18
27 - 18 = 9
18 - 9 = 9 ← common value of 9 obtained
Hence the HCF of 900 and 243 is 9
