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math and solution-ijso-round1-2549.pdf

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Page 1: math and solution-ijso-round1-2549.pdf
Page 2: math and solution-ijso-round1-2549.pdf

11. M B C 7 B = 2 fhflwlr D uu AB d AD : DB = 2 : 3 cnnbhnnqn D wh~7n tk ~ ~ d o c l E fi AABC i]#uh 25 m ~ m ~ l l ? a d - AADE 1ldud6m~rl?u n. I a. 2 9 . 3 s. 4

12. AABC 1)aui 16 msad?u firm q Mu: N oduuhu q A 3 wz AC ucl:rhI$ AAMC us-. ABNC ri~ddud 4 WVIJHJ?~ u k AAMN d & u 4 i n m ~ ~ l i x i

n. 1 a. 2 a. 3 4. 4

A A 13. ?anru%$B ~ ~ ~ u ~ ~ ~ ~ # ~ b r ~ j ~ ~ a r t r l ~ ~ u ~ ~ ~ ~ r t ~ ~ ~ ~ h u ~ ~ n " u m a a 7 HJ~DUR: 21 H ~ ? U

rl warh~oe~~?~ue?nsl~nm~&ud~n#ma~ j ~ ~ ~ a ~ u ~ 1 ~ 4 ~ ~ k t h n ' ~ o 1 ~ e i o ' 1 ~ r i

n, 1 Y. 2 FI. 3 4, 4

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