If a five digit number 247xy is divisible by 3, 7 and 11, then what is the value of (2y-8x)?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 6
The LCM of 3, 7, 11 is 231
Largest possible value of 247xy is 24799
when dividing 24799 by 231 we get 82 as a remainder
Number = 24799 – 82
⇒ 24717
Now x = 1 and y = 7
(2y – 8x) = (2 × 7 – 8 × 1)
⇒ (14 – 8) = 6