Solution

26147

First name
Matt and Louis
School
Collis Primary School
Country
Age
11

When doing this challenge, you have to times the middle number by three to find your answer because after adding the first three consecutive numbers, you will get the same answer as your middle number timesed. For example: 9,999+10,000+10,001 which equals 30,000. Then, the middle number(10,000)times three equals 30,000.