A B C D E F 3 B C D E F A 3 1995 13 27 299 1993 45 29 301 1995 47 5 12 30 6 12 31 67 17

1 1 4 8 00 2

145 1 1 11 12 1 1 1 1 1 1 1 1 1+ + + + + + + 2 6 12 20 30 42 56 72 1 1 1 1 2 + + + + 1 3 3 5 5 7 1993 1995

111 14 2 43 1 111 14 2 43 1 9 1 9 1 0 1 1 2 1 2 3 4 1 2 3 4 5 6 2 1 4 3 2 1 6 5 4 3 2 1 11 16 1 1 1 = + A B 24 A B

19931993 1994 1992 2 19941994 1995 1993

ABCD56 56 ABCD 303435

13 9 5 1 14 10 6 2 15 11 7 3 16 12 8 4 1 1 1 16 1 1 1 2 6 12 20 42 56 1 5 13 17 2 5 30 104 153

1 31 1965

3 7 = 04 & 28571 & A B C D E F 3 B C D E F A

3 1995 13 3 = 0 230769 & & 19956 = 332 3 13 27 299 1993 45 29 301 1995 47 27 2 1 29 29 299 2 1 301 301 1993 2 1 1995 1995 45 2 1 47 47 2 2 2 2 1995 301 47 29 27 45 299 1993 29 47 301 1995 5 12 30 6 12 31 67 17

12 60 31 = 6 60 5 60 30 60 155 17 = 170 12 = 144 67 = 134 60 60 60 60 134 144 155 170 30 5 12 6 67 12 31 17

17 1 7 17 1 7 41 1 7

1 1 2 8 00 4 90 1 5 75 1 1 120 2 4

23 A56B 88 145 1 1 11 12 145 1 1 11 12 144 12 1 = 11 12

= 144 + 12 1 11 12 1 12 1 = 144 + 12 11 12 = 12 1 11

1 1 1 1 1 1 1 1 1+ + + + + + + 2 6 12 20 30 42 56 72 1 1 1 1 2 + + + + 1 3 3 5 5 7 1993 1995 1 1 1 1 1 1 = + + + + + 1 2 2 3 3 4 7 8 8 9 1 1 1 1 1 1 1 1 = + + + + 2 2 3 3 4 8 9 = 1 = 8 9 1 9 1 2 1 1 1 1 1 1 = + + + 2 3 2 3 5 2 1 1 1993 1995 1 1 1 1 1 1 1 = + + + 2 3 3 5 1993 1995 1 1 = 1 2 1995

1 1994 = 2 1995 997 = 1995 111 14 2 43 1111 14 2 43 1 9 1 9 1 111 14 2 43 1 111 14 2 43 1 = 12345678987654321 9 1 9 1

0 1 1 2 1 2 3 4 1 2 3 4 2 1 4 3 2 1 6 5 4 5 6 3 2 1 11 16 11 16 27 11 27 = 214-1 14 16 11 14 11 16

11 16 168

1 1 1 = + A B 24 A B 1 24 1 3+ 8 = 24 24 3+ 8 1 3+ 8 3 8 = = + 24 24 3 + 8 24 3+ 8 24 3+ 8 1 3 8 1 1 = + = + 24 2411 2411 88 33 1 1 1 = + 24 88 33

AE = 2 AB 5 6-1 1-1 11 12 1 1 + 3 = = = 6 2 2 2 2 1 1 1 23 24 1 1 6 ( + 3 = = = 6 2 2 4 4 2 2 1 1 47 48 1 1 6 1 + 3 = = = 6 4 2 8 8 2 3 1995 6 1 2 1995 1 6 6 6 2 1995

7 8 9 10 11 12 13 14 15 3 1 0 3 2 1 4 3 2 5 4 1 2 0 1 2 0 1 2 0

1 1 1 1 1 1 1 1 1 16 32 64 25 10 20 40 80 50 19931993 1994 1992 2 19941994 1995 1993 1992 + 1 1993 1993+ 1 1992 2 1993 + 1 1994 1994 + 1 1993 1992 1993 + 1993 19931992 1992 = 1993 1994 + 1994 19941993 1993

1 = 1 = 1 99 12x y = 5

x 1 2 3 4 5 6 7 8 y 17.4 15 12.6 10.2 7.8 5.4 3 0.6 4 5 4 5 7 9 7 9 4 7 1 9 7 5 4 5 9

1 2 3 72 72 72 72 2 36 72 2 36 72 36 2 144 36 2 18 36 18 72 126 144 2 72 18 63 36 117 126 2 63 72 2 36

a b a c 480360 = bc 432 a b a c = 400 bc

A B C D

6 + 11970 1995 = 11946060 2

1+ 6 6 1+ 2 + 3+ 4 +5 + 6 = 2

ABCD56 56 ABCD 303435 5 6 A B C D + 3 0 3 4 3 5 A B C D 5 6 ABCD56 872156

1 + 11 9 1+ 2 + 3 + +11 = 9 = 594 2 1+100 100 1+ 2 + 3+ +100 = = 5050 2

5 2 1 2 1 0 2 0 2 1 3 1 1 2 3 1 1 5 0 0 7 0 3 6

13 9 5 1 14 10 6 2 15 11 7 3 16 12 8 4

6 + 14 9 = 5+ 2 +15 2 1 1 1 1 1 1 1 2 6 12 20 42 56 1 5 13 17 2 5 30 104 153 1 1 1 1 1 1 = = = 2 1 2 6 2 3 20 4 5 1 1 = 42 6 7 1 1 = 56 7 8 1 1 = 56 30 5 13 17 2 5 30 104 153 1 1 1 6 8 9 1 1 x 1 1 x 5 6 y 8 9 y = 1 7 1 7

1 5 x 5 13 17 5 30 y 104 153 1 x = 9 9 y 63 7 9 63 50 AE = = 5 10

235861 652971 235862 652974 1 20 1 1 1 + + + 1991 1992 2000 1 1 1 1 1 1 + + + + + 22 3 5 10 15 30 1 1 1 1 1 1 + + + + + 2 4 6 12 20 60 5 27 252 2 1 7 2

3 30 168 4 2 3 4 32 360 5 2 5

8 0

46111 1 4 2 4 3 11 13 19951

1 1 1 1 1 681 = + + + +

1 4

x = 5 13 15 235861 652971 18 235862 652974 1 20 10 = 10 1991 1991 10 1 = 1991 1991 1 2000 10 = 1 200

1 1 = 200 200 22 = 13 8 24 a = 1+ n n +1 n 2 n = 6 a = 1+ 6 6 +1 6 = 22 2 100 +1 n = 100 a 100 = 1+ = 5051 2 25 60 1 + 7 1-7 = 4 8 8 27252 5 2 1 2 + 1 = 196 7 30 1 1-3 = 4 4

4 32360 5 + 2 = 60 2 5 4 60 = 48 5 5

S + S = 1 12 1 h 1 2 3 + 1 1 12 h 2 2 3 = 1 4 h 1 + h2 2 = 1 4 12 2 S + S = 1 6 12 2

80-24 12 1000 60 = 7 25

= = 2 = = 12

681 = 1 2 + 1 4 + 1 8 + 1 12 + 1 24 3 5 7 11 13 17 33=3 11 1 0 0 1 0 0 1 91=7 13 0 0 1 0 1 0 1 105=3 5 7 1 1 1 0 0 0 2 143=11 13 0 0 0 1 1 0 2 55=5 11 0 1 0 1 0 0 2 25=5 2 0 2 0 0 0 0 1 231=3 7 1 0 1 1 0 0 1 221=13 17 0 0 0 0 1 1 1 119=7 17 0 0 1 0 0 1 2 39=3 13 1 0 0 0 1 0 2

180 50 2 45 + 180 60 = 36 35