Question

I am a multiple of 90. I am between 500 and 1100. I am also a multiple of 60. Who could I be?

Answer 1

Lcm of 90 n 60= 180 but it's not between 500 n 1100  so 6×90 = 540 n 60× 9= 540 so the answer is 540

Answer 2

Multiples of 90 = 90,180,270,360,450,540,630,720 ,810,900 Multiples of 60 =60,120,180,240,300,360,420,480 ,540,600,660,720,780,840  Common number = 720 AND is smallest