Question

Find the hcf and lcm prime Factorisation method 120, 90

Answer 1

Answer:

HCF= 30. LCM= 360

Step-by-step explanation:

120= [2x3x5] x2x2

90= [2x3x5] x3

Grouping the common factors and the rest,

[2x3x5], (2x2x3)

The ones in square bracket is the HCF. Multiply all the other numbers with HCF to get the LCM.