RRB Group-D Model Paper 12 with answers for online practice

Given:
Six Digit Number = 1123x7
Concept used:
Divisibility law of 9 ⇒ A number divisible by 9 if sum of its digit is divisible by 9.
Calculation:
1123x7 is divisible by 9.
Therefore, 1 + 1 + 2 + 3 + x + 7
⇒ 14 + x
If we put x = 4, then, the number become 18 which is divisible by 9.
∴ x = 4