Pro Tip

A hidden pair in a row is often invisible until you track each digit separately through that row.

Pro Tip
✓ Completed! 👍
3
8
7
1
5
6
2
7
5
3
6
2
8
9
2
6
8
5
9
7
3
4
4
1
2
9
5
1
8
6
3
7
5
4
6
2
5
7
1
7
8
3
2
8
9
6
5
Challenge Yourself

Try a puzzle two difficulty levels above your usual. Struggle is how expertise grows.

Challenge Yourself