9-sinf Matematika olimpiada №4 Oktabr 18, 2022Avgust 19, 2024 da chop etilgan InfoMaster tomonidan 9-sinf Matematika olimpiada №4 ga fikr bildirilmagan. 5 123456789101112131415161718192021222324252627282930 Vaqtingiz tugadi! Tomonidan yaratilgan InfoMaster 9-sinf Matematika olimpiada №4 2022-yil 12-oktabr: 2022-2023 o'quv yili tuman bosqichida tushgan savollar! 1 / 30 1. Ifodaning eng kichik qiymatini toping: A) -4 B) 4 C) 12 D) -12 2 / 30 2. (a2- 9)x = a2+ 2a - 3 tenglama a ningqandayqiymatidacheksizko’pyechimgaega? A) a ≠1 B) a=2 ; a = -3 C) a = 1 D) a=−3 3 / 30 3. Baliq og‘irliklari 14:12:11:8:15 kabi nisbatda bo‘lgan besh bo‘lakka bo‘lindi. Ikkinchi bo‘lakning og‘irligi 1,12 kg bo‘lsa, butun baliqning og‘irligini qancha? A) 6,72 kg B) 5,6 kg C) 6,4 kg D) 4,48 kg 4 / 30 4. bo‘lsa ifodaning qiymatini toping. A) 4 B) 3 C) 2 D) 1 5 / 30 5. Tenglamalar sistemasi nechta yechimga ega? A) 10 B) 6 C) 8 D) 12 6 / 30 6. ABC uchburchakning AE va BF medianalari P nuqtada kesishadi. Agar ABC uchburchak yuzi 36 bo‘lsa, PEСF to‘rtburchak yuzini toping. A) 12 B) 18 C) 6 D) 9 7 / 30 7. a parametrning qanday qiymatlarida 9 + 3a, 5 − 2a va 15 − 5a uzunlikdagi kesmalardan uchburchak yashash mumkin? A) (1/3 ; 1,2) B) (1/6 ; 1,1) C) (1/6 ; 1,5) D) (0; 2,5) 8 / 30 8. Agar a + b − 2c = 0 bo’lsa, ni hisoblang. A) 1 B) 3 C) 0 D) 2 9 / 30 9. Chizmada ∠AOD = 120∘, ∠BOD = 3∠AOB ?a ∠AOC = 2∠COD bo‘lsa, ∠BOC burchak nimaga teng? A) 45° B) 30° C) 50° D) 60° 10 / 30 10. Soddalashtiring A) 9 B) 6 C) 5 D) 0 11 / 30 11. ABCD to‘rtburchakda: AB=CD, BC= AD. Agar A burchak B burchakdan 4 marta katta bo‘lsa, to‘rtburchakning A burchagini toping. A) 132° B) 148° C) 124° D) 144° 12 / 30 12. Ikkinchi raqami uchinchi raqamidan 1 ta kam bo‘lgan uch xonali sonlar sonini toping. A) 55 B) 63 C) 95 D) 81 13 / 30 13. −16 ≤ 2(y − 7) ≤ 0 va −7 ≤ x ≤ 8 bo‘lsa, x² − y² ifodaning eng kichik qiymatini toping. A) 1 B) 2 C) 3 D) 0 14 / 30 14. Soddalashtiring: A) A B) D C) C D) B 15 / 30 15. Soat strelkasi 5 soat vaqt o‘tgandan keyin qanday burchakka buriladi? A) 160° B) 120° C) 150° D) 100° 16 / 30 16. Hisoblang: A) -4/3 B) -11/6 C) -22/12 D) -5/4 17 / 30 17. x0 haqiqiy son x³ +1 = (x² − x −1)² − 4 tenglama ildizi bo‘lsa, (x0 − 1)² ni toping. A) 7 B) 2 C) 5 D) 3 18 / 30 18. Agar 3x − y = 7 va 5x + 4y = 21 bo‘lsa, 24x + 9y ni hisoblang. A) 84 B) 78 C) 69 D) 90 19 / 30 19. Agar ac < 0 bo‘lsa, y=ax-bx²-c funksiya grafigi koordinatalar tekisligining qaysi choraklaridan o‘tadi? A) I, III, IV B) II, III, IV C) Barcha chorakdan o'tadi? D) I,II,III 20 / 30 20. Agar bo'lsa, ning qiymatini toping. A) 5 B) 6 C) -4 D) 0 21 / 30 21. Chizmadagi uchburchaklar sonini toping. A) 24 B) 26 C) 28 D) 30 22 / 30 22. f(x)=ax+b funksiya grafigi A(-1;3) va B(1;7) nuqtalar orqali o‘tadi. f(4- f( -1)) ni toping A) 10 B) 9 C) 7 D) 12 23 / 30 23. Uchlari A(2; −3), B(6; 0), C(6; 2) va D(2; 2) nuqtalarda bo‘lgan ABCD to‘rtburchak yuzini toping. A) 14 B) 16 C) 18 D) 12 24 / 30 24. Oila erkak kishi, uning ayoli va talaba qizidan iborat. Agar erkak kishining maoshi 2 barobar oshsa, u holda oila daromadi 67%ga ortadi, agar talaba qizning stipendiyasi 3 barobar kamaysa, oila daromadi 4%ga qisqaradi. Ayolning maoshi oila daromadining necha foizni tashkil qiladi? A) 25 B) 27 C) 28 D) 26 25 / 30 25. Raqamlari yig‘indisi 2 ga teng bo‘lgan o‘n xonali natural sonlar nechta? A) 25 B) 15 C) 10 D) 9 26 / 30 26. Ikkinchi raqami uchinchi raqamidan 4 marta katta, birinchi raqami esa ikkinchi raqamidan 3 ta kam bo‘lgan uch xonali sonlar nechta? A) 2 B) 4 C) 1 D) 3 27 / 30 27. a parametrning qanday qiymatlarida 9 + 3a, 5 − 2a va 15 − 5a uzunlikdagi kesmalardan uchburchak yashash mumkin? A) (0; 2,5) B) (1/6 ; 1,5) C) (1/3 ; 1,2) D) (1/6 ; 1,1) 28 / 30 28. Tenglamani yeching: A) 10/11 B) 0 C) 29/220 D) Ø 29 / 30 29. Soddalashtiring: A) B B) D C) C D) A 30 / 30 30. Anvar 2 dan boshlab barcha natural sonlarni doskaga yozdi. U yozayotganda to‘la kub bo‘lgan sonlarni qoldirib ketdi (8, 125 kabi). Doskaga 2186-o‘rinda yozilgan sonni toping. A) 2197 B) 2200 C) 2199 D) 2198 0% tomonidan Wordpress Quiz plugin Matematika olimpiada, Tuman 2022-2023 o'quv yili