Question

If a six–digit number 3x9z8y is divisible by 7, 11, 13, then the average value of x, y, z is:

• A. 23/3
• B. 31/3
• C. 20/3
• D. 8

Answer 1

Answer:

C. 20/3

As we know,

6–digit number repeated its three digit is divisible by 7, 11 and 13. For example 345345, 125125, 387387 etc.

Now, we can write this 3x9z8y as 389389

Comparing on we get

x = 8, z = 3 and y = 9

Sum of x + y + z = 8 + 3 + 9 = 20

Average of x, y and z = $\frac{20}{3}$