10 Perception checks. If allowed I'll just take 10's for 17 on them. If not... these rolls:
Rolled 1d20+7 : 6 + 7, total 13
Rolled 1d20+7 : 16 + 7, total 23
Rolled 1d20+7 : 2 + 7, total 9
Rolled 1d20+7 : 4 + 7, total 11
Rolled 1d20+7 : 16 + 7, total 23
Rolled 1d20+7 : 5 + 7, total 12
Rolled 1d20+7 : 4 + 7, total 11
Rolled 1d20+7 : 1 + 7, total 8
Rolled 1d20+7 : 13 + 7, total 20
Rolled 1d20+7 : 12 + 7, total 19