Find the different one:

The correct answer is Option (2) → 9900

Given numbers: 3085, 9900, 5116, 8179

Looking at the four numbers, we need to identify the property that makes one number different from the others.

First, find the sum of the digits of each number.

For 3085: 3 + 0 + 8 + 5 = 16

For 9900: 9 + 9 + 0 + 0 = 18

For 5116: 5 + 1 + 1 + 6 = 13

For 8179: 8 + 1 + 7 + 9 = 25

A number is divisible by 9 if the sum of its digits is divisible by 9.

Checking each case:

• 16 is not divisible by 9

• 18 is divisible by 9

• 13 is not divisible by 9

• 25 is not divisible by 9

Thus, 9900 is the only number divisible by 9, while the other three numbers are not.

Therefore, the different one is Option (2): 9900.

Note: The given answer is as per NTA. However, Option (4) could also be considered a possible answer based on another property.

Check primality:

• 3085 → Not prime (divisible by 5)

• 9900 → Not prime (divisible by 2, 3, 5)

• 5116 → Not prime (divisible by 2)

• 8179 → Prime number

Conclusion: 8179 is the only prime number among the options, so it could also be treated as the different one.