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