Question

Common multiples of 4, 5 and 11 are _________.

• A. 220, 440 and 660
• B. 220, 221 and 222
• C. 210, 220 and 240
• D. 200, 210 and 220

Answer 1

The correct option is A

220, 440 and 660

Common multiples of any given set of numbers will always be the multiples of the LCM of the numbers.

Now, LCM of 4, 5 and 11 can be found as follows.
Hence, LCM = $2\times 2\times 5\times 11=220$
The multiples of 220 are 440, 660, 880...

Hence, in the given options, the common multiples of 4, 5 and 11 are 220, 440 and 660.