(506) 3

Part of 1996 Tournament Of Towns

Problems(1)

TOT 506 1996 Autumn J O3 .... 10 girls and 9 boys

Source:

(a) Can it happen that in a group of

10

9

boys, ball the girls know a different number of boys while all the boys know the same number of girls?
(b) What if there are

11

10

boys?
(NB Vassiliev)