Puzzle 5 is probably base64-encoded just like puzzle 3, we get

'30 31 31 31 30 30 31 31 20 30 31 31 30 30 30 30 31 20 30 31 31 31 30 31 31 30 20 30 31 31 30 31 31 31 31 20 30 31 31 31 30 30 31 30 20 30 31 31 31 31 30 30 31'

looks a lot like 8-bit groups, if 30 = 0 and 31= 1 we can interpret as

'01110011,01100001,01110110,01101111,01110010,01111001'

interpreting as ASCII again gives: savory