Select the option that is related to the third number in the same way as the second number is related to the first number.

7 : 329 :: 9 : ?

711

The pattern followed is,

For,

7 : 329

2 + 3 + 9 = 14, 14 is divisible by 7

Similarly,

Option 1 → 711 → 7 + 1 + 1 = 9, 9 is divisible by 9

Option 2 → 728 → 7 + 2 + 8 = 17, 17 is not divisible by 9

Option 3 → 1029 → 1 + 0 + 2 + 9 = 12, 12 is not divisible by 9

Option 4 → 743 → 7 + 4 + 3 = 14, 14 is not divisible by 9

Hence, “711” is the correct answer.