Page 109 - Fixtures

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6 1000

a +b +c = 6 abc

4 .0 ≤a ,b ,c ≤ 9
12 .C(8,2) = 8! = 28

2!×6!

[Aust.MC 1987] ( )

1

2 . 2 + 3 + 4 + 5 = 14 > 12

.1 + 3 + 4 + 5 = 13 > 12

{4, 5} .a +b = 9 ba

.{1,2, 4, 5} {1,2, 3,6} .{3, 6}

. 4! = 24

. 24 + 24 = 48

[Aust.MC 1985] ( )

1 ≤ x =/ y =/ z ≤ 30 z y x

3