Answer to win - 246 47632 is the odd one out - why?
Take the first three digits in every set of numbers (ex. 841 of 84129), the following second digits is the equivalent to their square root (ex. 29 of 84129) - square root of a number is a value that when multiplied by itself gives the number ex. 29 x 29 = 841 so the square root of 841 is 29.