Uy » Online olimpiada » Matematika olimpiada » 7-sinf Matematika olimpiada №1 Matematika olimpiada 7-sinf Matematika olimpiada №1 InfoMaster Aprel 29, 2022 1388 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 3 7 12345678910111213141516171819202122232425 Vaqtingiz tugadi! 7-sinflar Matematika olimpiada №1 2019-yil bilimlar bellashuvida tushgan savollar Ismi familiyangizni kriting! Iltimos ma'lumotlaringizni to'g'ri kritishga e'tibor bering! 1 / 25 1. Ifodani ko`paytuvchilarga ajrating: 9b²-(a-3b)² A) (6b-a)(6b+a) B) 18b²-a²+6ab C) a² D) (6b-a)a 2 / 25 2. Umumiy AB asosga ega bo`lgan ACB va ADB uchburchaklar berilgan. CD va AB lar O nuqtada kesishadi. Agar ∠DAB= ∠CBA, ∠CAB= ∠DBA, DB=24 sm bo`lsa, CA ni toping. A) 24 sm B) 30 sm C) 12 sm D) 48 sm 3 / 25 3. Ko’paytuvchilarga ajrating: x⁴+x²+1 A) II B) III C) IV D) I 4 / 25 4. To`g`ri burchakli parallelepipedning asosi tomoni c sm ga teng bo`lgan kvadratdan iborat bo`lib,balandligi d Bu parallelepipeddan qirrasi c sm bo`lgan kub qirqib olindi. Qolgan qismining hajmi V (sm3)ni hisoblash formulasini tuzing. Agar c=2,5 sm, d=4 sm bo`lsa, V ni toping. A) 81/8 B) 1/8 C) 75/8 D) 9 5 / 25 5. A, B va C nuqtalar bir to`g`ri chiziqda yotadi. Agar AB=14 sm, BC=16,5 sm bo`lsa, AC ni toping. A) 2,5 sm va 30,5 sm B) 3,5 sm va 29,5 sm C) 30,5 sm D) 2,5 sm 6 / 25 6. O’lchovlari 8 va 20 ga teng bo’lgan to’g’ri to’rt burchaklardan eng kamida nechtasini birlashtirib, kvadrat hosil qilish mumkin? A) 15 B) 9 C) 11 D) 10 7 / 25 7. Asosi BC bo`lgan teng yonli ABC uchburchakning perimetri 40 sm va teng tomonli BCD uchburchakning perimetri 45 sm ga teng. AB va BC tomonlarni toping. A) AB =15 sm; BC =12,5 sm; B) AB =16 sm; BC =12 sm; C) AB =12,5 sm; BC =15 sm; D) AB =12 sm; BC =16 sm; 8 / 25 8. Tenglamani yeching: 8x+5=119+(7-3x) A) 1,1 B) 12 C) 11 D) 1,2 9 / 25 9. M ni shunday birhad bilan almashtiringki, natijada noma’lumning barcha qiymatlarida to`g`ri tenglik hosil bo`lsin: A) II B) III C) I D) IV 10 / 25 10. Tenglamani yeching. 4,5-1,6∙(5x-3)=1,2∙(4x-1)-15,1 A) 0 B) 2 C) 3 D) 1 11 / 25 11. Sonni standart ko`rinishda yozing: 1247800000 A) III B) II C) IV D) I 12 / 25 12. Tenglamaning ildizi x0 bo’lsa, 18:x0 ifodaning son qiymatini toping. A) 78/7 B) -7 C) 7 D) 6 13 / 25 13. Telefon stansiyasi mijozlarining uy telefon raqamlari 7 xonali sonlardan iborat va 573 sonidan boshlanadi. Shu stansiya nechta mijozga xizmat ko`rsatishi mumkin? A) 30000 B) 15000 C) 10000 D) 1000 14 / 25 14. Hisoblang: A) III B) II C) I D) IV 15 / 25 15. Ikkita parallel to`g`ri chiziqlarni to`g`ri chiziq bilan kesishishidan hosil bo`lgan mos burchaklarning yig`indisi 2100 ga teng.Bu burchaklarni toping. A) 115°; 95° B) 105°; 105° C) 80°; 130° D) 110°; 100° 16 / 25 16. Agar qo`shni burchaklardan biri ikkinchisidan 450 katta bo`lsa,ularni toping . A) 135°;45° B) 113°;67° C) 111°30'; 68°30' D) 112°30'; 67°30' 17 / 25 17. Uchburchakning ikkita uchidagi tashqi burchaklari o`zaro teng va perimetri 74 sm, uning bir tomoni 16 sm ga teng. Ikkita qolgan tomonlarini toping. A) 27, 32 B) 31, 29 C) 29, 30 D) 29, 29 18 / 25 18. Bir ishni 10 kishi 8 kunda bajara oladi. 2 kundan so`ng, uchinchi kuni ularga yordam berish uchun bir necha kishi qo`shildi va qolgan ishni 4 kunda bajarishdi. Necha kishi kelib qo`shilgan? A) 5 B) 6 C) 3 D) 4 19 / 25 19. ABC uchburchakning AD medianasi BC tomondan keyin DE= AD bo`lgan kesmaga davom ettirilib, E nuqta B nuqta bilan tutashtirildi.Agar ∠ACD=450, ∠ABD=350 bo`lsa, ∠ABE ni toping. A) 75° B) 80° C) 70° D) 10° 20 / 25 20. Algebraik kasrni qisqartiring: A) III B) II C) IV D) I 21 / 25 21. Uchburchakning ikki bissektrissasining kesishishidan hosil bo`lgan burchak 1280 ga teng. Uchburchakning uchinchi burchagini toping. A) 65 B) 67 C) 64 D) 66 22 / 25 22. Ifodaning qiymatini toping: A) 125 B) 25 C) 15 D) 195 23 / 25 23. Gazlamaning narxi 20 Ma’lum vaqtdan so’ng, yangi narx ham 25 ortdi. Gazlamaning narxi jami necha foiz ortdi? A) 70 % B) 55 % C) 60 % D) 50 % 24 / 25 24. To`g`ri burchakli uchburchakning gipotenuzasiga tushirilgan medianasi 8 sm. Uchburchakning burchaklaridan biri 600 bo`lsa, bu burchakka yopishgan tomonlarini toping (sm). A) 5 B) 7 C) 9 D) 8 25 / 25 25. 1, 2, 3, 4, 5, 6 va 7 raqamlaridan, ularni takrorlamasdan nechta 4 xonali son tuzish mumkin? A) 36 ta B) 33 ta C) 35 ta D) 34 ta 0% Testni qayta ishga tushiring Author: InfoMaster Foydali bo'lsa mamnunmiz
