100
100
100
110
well it is above average for a 13 year old so yes 128 is a respectable IQ average!
No
100.
its above average, the average IQ is 100 whatever your age.
Around 100-170
it is excellent and above average
The average IQ of everyone is 100. See the related links for a site that has some basic facts about IQ, for more information.
The average IQ for a 65-year-old male is around 97-98. IQ tends to remain relatively stable throughout adulthood, so this value would be consistent with the general population average.