A 9-digit number 846523X7Y is divisible by 9, and Y - X = 6. Find the value of…
2023
A 9-digit number 846523X7Y is divisible by 9, and Y - X = 6. Find the value of √(2X + 4Y).
- A.
4
- B.
2
- C.
6
- D.
8
Attempted by 20 students.
Show answer & explanation
Correct answer: C
The known digit sum is 35. With Y - X = 6 and divisibility by 9, X = 2 and Y = 8. Thus sqrt(2X + 4Y) = sqrt(4 + 32) = 6.