Problem / game
First name
Aiden
School
Kingswood College Year 3
Country
Age
0
I investigated adding the top first number to the bottom fifth number (1+10), (3+8), (5+6), (7+4) these answers will always be 11.
Then I continued this pattern by adding (11+20), (13+18), (15+16), (17+14), (19+12) these answers all add up to 31.
I noticed that both these numbers have 1 in the units column and a difference of 20.