12*10 = 120
6*10 + 12*1 = 60 + 12 = 72
1332
12 tens mean there are 1 tens and 2 ones, as only one digit can occupy a column.
120 or 1 hundred+2 tens
620=500+12 tens 12 tens=12*ten=120 500+120=620 couldn't had just googled it?
The number 48 !
326
10
52..
129
1