Which one will replace the question mark ?
12
6
9
18

Well done!

Nice try!

Please choose an answer!

solve

(12 + 18 + 30)/10 = 6

(16 + 24 + 40)/10 = 8

Similarly, (45 + 18 + 27)/10 = 9.

Try another topic:
Logical Problems(Age 7++)