Question

L.C.M. of 1 and 90 is 1.

• A. 90
• B. 360

Answer 1

The correct option is A

90

Step I: Write the multiples of 1.
1, 2, 3, 4, .........90, 91, 92, .....

Step II: Write the multiples of 90.
90, 180, 270, 360, 450, .....

Step III: Find the least common multiple of 1 and 90.
From the above two steps, we can say that, the least common multiple of 1 and 90 is 90.

Things to remember: L.C.M. of 1 and x is x.