" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
u/ b=3
Un=3+3n-3
999=3n
n=333
u/ b=5
Un=5+5n-5
995=5n
n=199
≡ n = 999-333-199
= 467