We were told that his raw score was 42/45 and that this standardised at 125 ( out of the possible 140).
The test was clearly relatively easy however the standardisation helps to eliminate the fact the paper was either hard or easy.
The highest scorer will get 140 and the lowest 70 with 100 being the average.
Given only one score its impossible to see the distribution in this case but say... 39 correct was average and 44 correct was the best achieved in the test by all that sat it. Those getting 39/45 get 100; those on 44/45 get 140.
Your DS scores 125 which puts them well above average; in fact roughly in the top 10%. A good result.
for more detail.