Six, Eight, Nine? Your first digit is "8", and the riddle below is your last and final digit to open the Vault of the Maya City of Tikal  There are nine numbers, and this is your ninth and last digit. If two’s company, and three’s a crowd, what are four and five? This number will also become smaller when you turn it upside down? 83_ _5_ _7_  Open the Vault of Tikal