Ekspert a’zolari:
1. 35-maktab o’qituvchisi: Toirova Dilbar
2. 1-maktab o’qituvchisi: X. O’rinova
3. 34-maktab o’qituvchisi: D. Toirov
Bilimlar bellashuvi – 2013. Matematika - 8. Test. I variant
1. 420 va 156 sonlarining umumiy bo’luvchilari nechta?
A) 7; B) 5; C) 6; D) 4; E) 8.
2. Hisoblang: 0,8 + 0,2 : .
A) 0; B)1; C) 1,6; D) – 0,6; E) – 1 .
3. Ushbu m = 0,55(57); n = 0,5(557); l = 0,555(7) sonlarini kamayish tartibida yozing.
A) l > m > n; B) l> n > m; C) m > n > l; D) n > l > m; E) n > m > l.
4. Ifodani soddalashtirgandan keyin nechta haddan iborat bo’ladi?
( y 3 – 1 ) + ( y 2 + 1 ) ( y 4 – y 2 + 1 ).
A) 4; B) 5; C) 6; D) 3; E) 2.
5. Ko’paytuvchilarga ajrating: (x 2+ 9 )2 – 36x 2.
A) ( x 2 – 5 )( x 2 + 4); B) ( x – 3 )2· ( x + 3 )2; C) ( x – 6 )2 · ( x + 6 )2;
D) x 2 ( x 2 – 6 ); E) ( x 2 – 3 ) · ( x + 3 ).
6. Soddalashtiring :
A) ; B) ; C) ; D) ; E) .
7. Tenglamani yeching :
A) 1 ; B) 1 ; C) 1 ; D) 1 ; E) 1 .
8. Quyidagi sonlarning qaysi jufti tenglamalar sistemasini qanoatlantiradi?
A) ( 4; 3) ; B) ( 1; 6 ); C) ( 2; 5 ); D) (5; 2); E) (3; 4).
9. tengsizlikning butun sonlardan iborat yechimlaridan eng kattasini
ko’rsating.
A) 2; B) – 1; C) 1; D) 0; E) – 2.
10. Tengsizliklar sistemasining eng katta va eng kichik butun yechimlari yig’indisini toping:
A) 17; B) 16; C) 18; D) 19; E) 15.
11. Quyidagi nuqtalarning qaysi biri f(x) = – 4x + 3 funksiyaning grafigiga tegishli?
A) ( - 1; 1); B) ( 2; 5 ); C) ( - 5; 2 ); D) ( 1; - 1); E) ( 0; - 3 ) .
12. y = 2x + 1 va y = – 2 – x funksiyalarning grafiklari qaysi koordinatalar choragida kesishadi?
A) I; B) II; C) III; D) IV; E) kesishmaydi.
13. Teng yonli uchburchakning uchidagi tashqi burchagi o’sha uchdagi ichki burchagidan 4 marta katta.
Uchburchakning asosidagi tashqi burchagi necha gradus?
A) 100; B) 102; C) 96; D) 108; E) 104.
14. Uchburchakning tomonlari o’rtalarini tutashtirib, perimetri 65 m ga teng bo’lgan uchburchak hosil
qilindi. Berilgan uchburchakning perimetrini toping.
A) 32,5 m; B) 260 m; C) 75 m; D) 195 m; E) 130 m.
15. To’g’ri to’rtburchakka diagonal o’tkazish natijasida u to’rtta uchburchakka ajratildi. Shu
uchburchaklardan birining yuzi 27 sm2 ga teng . To’g’ri to’rtburchakning yuzini toping.
A) 112 sm2; B) 108 sm2; C) 111 sm2 ; D) 96 sm2; E) 102 sm2.
16. To’g’ri to’rtburchak shaklidagi maydonning eni 32 m. Agar shu maydonning yuzi 2 gektar bo’lsa,
uning bo’yi necha metr bo’ladi?
A) 610 m; B) 615 m; C) 620 m; D) 625 m; E) 630 m.
17. ABCD trapetsiyaning o’rta chizig’i uni o’rta chiziqlari 13 va 17 bo’lgan ikkita trapetsiyaga
ajratadi. ABCD trapetsiyaning katta asosini toping.
A) 19; B) 21; C) 18; D) 30; E) 23.
18. Parallelogrammning burchaklaridan biri ikkinchisidan uch marta katta. Perallelogrammning katta
burchagini toping.
A) 1050; B) 1100; C) 1200; D) 1350; E) 1500.
19. Harakat boshlangandan 0,8 soat o’tgach, mototsiklchi velosipedchini quvib yetdi. Mototsiklchining
tezligi 42 km/soat , velosipedchiniki 12 km/soat bo’lsa, harakat boshlanishidan avval ular orasidagi
masofa qancha bo’lgan ?
20. Ikki sonning ayirmasi 5 ga teng . Agar shu sonlardan kattasining 20 % I ikkinchisining siga teng
bo’lsa, shu sonlarni toping.
21. Turist butun yo’lning 0,35 qismini o’tganda , unga, yo’lning yarmigacha 18,3 km qolgani ma’lum
bo’ldi. Butun yo’lning uzunligini toping.
22. ( x; y) sonlar jufti sistemaning yechimi bo’lsa, x + y ni toping.
23. O’ziga qo’shni burchakning qismiga teng burchakni toping.
24. Teng yonli trapetsiyaning perimetri 36 sm, o’rta chizig’i 10 sm. Yon tomonining uzunligini toping.
25. O’lchamlari 24 m X 15 m bo’lgan zalni tomoni 20 sm bo’lgan kvadrat shaklidagi plitkalardan nechtasi
bilan qoplash mumkin?
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