An old man willed that upon his death, his three sons would
receive the uth, vth and wth parts of his herd of camels (i.e.,
1/u, 1/v and 1/w of the herd). He had uvw-1 camels in his
herd when he died. Since they could not divide uvw-1 into u,v
and w parts, they approached a distinguished mathematician
for help. He rode over and added his camel to the herd, and
then fulfilled the old man’s wishes. One camel remained, which
was of course his own.
How many camels were there in the herd?