Which one of the following number pairs is divisible by both 13 and 17?
Show answer & explanation
Correct answer: B
Explanation
Given:
The number must be divisible by both 13 and 17.
If a number is divisible by both 13 and 17, it is divisible by their LCM.
LCM(13, 17) = 13 × 17 = 221
Now let's check the options:
221 ÷ 221 = 1
443 ÷ 221 ≈ 2.004
663 ÷ 221 = 3
884 ÷ 221 = 4
Therefore, the two numbers that are divisible by both 13 and 17 are:
663, 884