Question

Help means should be well explained :) ​

Answer 1

There are 7 numbers

Calculate sum of digits of all numbers

• 331=3+3+1=7
• 482=4+8+2=14
• 551=5+5+1=11
• 263=2+6+3=11
• 383=3+8+3=14
• 362=3+6+2=11
• 284=2+8+4=14

We observe that

$\\ \sf\longmapsto 482\sim383\sim284$

$\\ \sf\longmapsto 551\sim263\sim362$

• 331 is odd one

Option C

Answer 2

551, it is too big of a number so it is the outlier. :)