Vastaus:
# X = 961 #
Selitys:
#sqrt (1 + sqrt (3 + sqrt (5 + sqrtx))) = 2 #
tai # 1 + sqrt (3 + sqrt (5 + sqrtx)) = 4 #
tai #sqrt (3 + sqrt (5 + sqrtx)) = 3 #
tai # 3 + sqrt (5 + sqrtx) = 9 #
tai #sqrt (5 + sqrtx) = 6 #
tai # 5 + sqrtx = 36 #
tai # Sqrtx = 31 # tai # X = 961 #
