Level 3
Some stickers are packed into exactly packets of 10.
If the stickers are repacked into packets of 7,
there are 4 more packets and 2 stickers left.
Level 3
Some stickers are packed into exactly packets of 7.
If the stickers are repacked into packets of 10,
there are 4 less packets and 2 stickers extra.
Level 3
Some stickers are packed into exactly packets of 7.
If the stickers are repacked into packets of 10,
there are 4 less packets and needs 6 more stickers to make another packet.