Answer :
Final answer:
The other number is 54.
Explanation:
To find the other number, we can use the formula:
LCM × HCF = product of the two numbers.
Given that HCF is 18, LCM is 270, and one of the numbers is 90, we can substitute these values into the formula: 270 × 18 = 90 × other number. We can solve for the other number by dividing both sides of the equation by 90: other number = (270 × 18) / 90 = 54.
Therefore, the other number is 54, so the correct option is 1) 54.
Learn more about HCF and LCM here:
https://brainly.com/question/36924461
#SPJ11
