4 1 15 15 1.4 17 11 24 18 _ 25 A. 27 B.29 C.31 D.33 1. C 17,24 31 7 2. 1 3 7 13 21 _ A. 30 B.31 C.32 D.33 2. B 2. 3.1/3 1/3 4/9 2/3 16/15 _ A. 13/12 B.16/9 C.19/18 D.31/18 3. B 2 1,2,4,8,16 32 3 3,6,9,12,15 18 16/9. 4. 108 36 3 12 _ A. 4 B.1/2 C.1/3 D.1/4 4. D 5. 1 2 4 12 A.10 B.12 C. 5. B 1+2)X 4=12 ，( 3+2)X 2=10 ，( 1+3)X 3=12. 14 D.16 ( 610 ) 6. 5 124.12 8.130.136.142 _ A. 21 B22 C.23 D.24 6. C (124+128+130+136+142 )- 4-142=23. 7. 3280 / 25% 18% ( ) _ A.3550 B.3650 C.3750 D.3850 7. C x, 0.8x-
