by Serhiy Grabarchuk Jr

Solution Step 0/0

Which digit should replace the question mark in order to complete the sequence?

Each digit in the sequence starting from the second one indicates how many sections the preceding digit consists of. The “5” should replace the question mark in order to complete the sequence. Btw, starting with the first “5” all the following digits in the sequence are always “5”.

Check 3

Check 4

Check 5

Check 6