Velosipedchi shahardan soatiga 13,4 km/soat tezlik bilan yo’lga chiqdi. Undan soat keyin ikkinchi velosipedchi jo’nadi va soatda birinchi velosipedchiga yetib oldi. Ikkinchi velosipedchining tezligini toping

1. Velosipedchi shahardan soatiga 13,4 km/soat tezlik bilan yo’lga chiqdi. Undan 2 soat keyin ikkinchi velosipedchi jo’nadi va 4 soatda birinchi velosipedchiga yetib oldi. Ikkinchi velosipedchining tezligini toping.

A) 6,7 B) 13,4 C) 20,1 D) 26,8

2. Kater oqim bo’ylab harakat qilib, 5 soatda

156,5 km yo’l bosdi. Agar katerning turg’un suvdagi tezligi 28,2 km/soat bo’lsa, daryo oqimining tezligini toping.

A) 32,1 B) 3,9 C) 28,2 D) 14,1
3. Avtomobilga 8 ta bir xil quti va har birining massasi 0,28 t bo’lgan 8 ta yashik ortildi. Agar butun yukning massasi 2,4 t bo’lsa, bitta quti va ikkita yashikning og’irligini toping.

A) 0,56 B) 0,02 C) 0,58 D) 0,52

4. tenglamalar sistemasini qanoatlantiruvchi yechimlar nechta?

A) 2 B) 0 C) 3 D) 1

5. Tog’ri burchakli parallelepipedning hajmi 25,2dm³, bo’yi 3,5dm, eni 16 sm. Uning balandligini toping (dm).

A) 4,5 B) 45 C) 9 D) 18

6. BDM yoyiq burchakda DE bissektrisa va DC nur o’tkazilgan. Agar ∠CDE=19^o bo’lsa, BDC burchakni toping.

A) 81^o B) 109^o C) 90^o D) 81^o yoki 109^o

7. Mototsiklchi 12,3 km/soat tezlik bilan 4 soat, 11,7 km/soat tezlik bilan 2 soat yurdi. Velosipedning butun yo’ldagi o’rtacha tezligini toping.

A) 12,1 B) 12,3 C) 11,7 D) 11,1

8. tenglama ildizlari ko’paytmasini toping.

A) B) 2 C) D) 1

9. To’g’ri chiziqli yo’lak bo’ylab 50 ta ustun o’rnatildi. Ustunlar orasidagi masofa bir xil. Agar birinchi va oxirgi ustunlar orasidagi masofa 2450 m bo’lsa, qo’shni ustunlar orasidagi masofani toping.

A) 49 B) 50 C) 98 D) 100

10. ni hisoblang.

A) B) C) 2012 D)

11. Yuzi 120 sm², diagonali esa 17 sm bo’lgan to’g’ri to’rtburchakning tomonlarini toping (sm)

A) 30; 4 B) 12; 10 C) 16; 12 D) 15;8

12. tengsizliklar sistemasini yeching.

A) B)

C) D)
13. Arifmetik progressiyaning uchinchi va beshinchi hadlarining yig’indisi 12 ga teng. Dastlabki 5 ta hadi yig’indisi 25 ga teng bo’lsa, progressiyaning birinchi hadini toping.

A) 5 B) 3 C) 6 D) 4

14. tenglamaning ildizlari ko’paytmasini toping.

A) 4 B) – 2 C) – 4 D) 6

15. Agar bo’lsa,

ifodani soddalashtiring.

A) 1 B) C) D) – 1

16. Kubning sirti 294 sm² ga teng. Uning barcha qirralari yig’indisini toping. (sm)

A) 147 B) 98 C) 117 D) 84

17. To’g’ri to’rtburchakning bo’yi kvadratning tomonidan 8m uzun, eni esa shu kvadrat tomonidan 4m qisqa. Kvadratning tomonini x bilan belgilab, to’g’ri to’rtburchakning perimetri va yuzi uchun ifoda tuzing.

A) P=4x+4; S=x²+4x-18

B) P=4x+8; S=4(x+8)

C) P=4(x+2); S=(x+8)(x-4)

D) P=4x+2; S=(x+8)(x-4)
18. Uchburchakning tomonlari 25 , 29 va 36 ga teng bo’lsa, unga ichki chizilgan aylana uzunligini toping.

A) B) C) D)

19. Idish to’g’ri burchakli parallelepiped shaklida bo’lib, uning bo’yi 60 sm, eni 45 sm va balandligi 47 sm ga teng. Agar idishdagi suv sathi 40 sm balandlikda bo’lsa, unda necha litr suv bor.

A) 135 B) 106 C) 108 D) 115

20. tenglamani qanoatlantiradigan oraliqni toping.

A) B)

C) D)
21. ifodani ko’paytuvchilarga ajrating.

A)

B)

C)

D)
22. Bir ishchi ishning 10% ini t vaqtda, ikkichi ishchi 20% ini t+1 vaqtda bajardi. Agar ikkalalari birga ishlasa, jami ishni qancha vaqtda bajaradi.

A) B)

C) D)
23. tenglama nechta turli ildizga ega.

A) 1 B) 2 C) 3 D) 0

24. qanday tub songa teng bo’lganda soni biror natural sonning kvadratiga teng bo’ladi?

A) 97 B) 83 C) 73 D) 79

25. 0; 1; 2; 3; 5; 8 raqamlaridan ularni takrorlamasdan jami nechta 3 xonali son tuzish mumkin.

A) 125 B) 216 C) 100 D) 180

26. Futbol jamoasidagi 11 kishi orasidan jamoa sardori va uning yordamchisini necha xil usulda tanlab olish mumkin?

A) 110 B) 55 C) 22 D) 121

27. ; ; … arifmetik progressiyaning birinchi manfiy hadini toping.

A) B) C) D)

28. , va to’g’ri chiziqlar bilan chegaralangan figuraning yuzini toping.

A) 25 B) 13,5 C) 27 D) 12,5

29. ni hisoblang.

A) B) C) D)

30. bo’lsa, ni toping.

A) 2 B) 3 C) 5 D) 4