What is the least value of * so that the number 457643*4 is divisible by 18?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 3.
Divisible by 18: Must be divisible by both 2 and 9
Last digit = 4 (even) → Divisible by 2
Sum of digits = 4 + 5 + 7 + 6 + 4 + 3 + * + 4 = 33 + *
If * = 3 then, 33 + * = 36 (Divisible by 9)
Hence, the required value is 3.