8-sinf. Testlar. I-variant

8 – SINF V variant
1. Algebraik ifodaning son iymatini toping.
V = 1/5 abh a= 50 b = 2 h = 3
A) 500 B) 60 D) 100 E) 600
2. Qavslarni oching va soddalashtiring :
7x – (3y + 2x) – (-2y-5x)
A) 10x – y B) -10x + y
D) – y E) – 10x – 5y
3. y = kx + 2 funksiya grafigi (1;1) nuqtadan o`tadi. k = ?
A) 2 B) 1 C) -1 D) -2
4. y = 4x – 5 funksiya grafigining koordinata o`qlari bilan kesishish nuqtalarining
koordinatalarini toping.
A) (0;5), (-5/3;0) B) (0;-5), (-5/4;0) C) (0;5), (3/5;0) D) (0,5) , (5/3,0)
5. Tenglamalar sistemasini yeching:
A) (0,-5) B) (0;5)
C) (5;10) D) (-5;0)
6. (x,y) sonlar juftligi sistemaning yechimi bo`lsa, y – x ni toping.
A) -2 B) -3 C) 3 D) 2
7. Tenglamani yeching : A) x= B) x= -11 C) x= 121 D) x=11
8. Agar 3a – b = 7 b – c = 5 va 3c – a = 2 bo`lsa a + c ni toping.
A) 7 B) 14 C) 21 D) 28
9. x ning qanday qiymatida P(x) = x³ + 4x² – 12x + 17 ko`phadning qiymatini biror sonning
kvadrati shaklida tasvirlash mumkin?
A) -2 B) 2 C) 1 D) 3
10. Hisoblang : 779³ + 3*779²*221 + 3*779*221² + 221³ + 10
A) 100000010 B) 1000010 C) 1000000010 D) 10000010
11. Agar bo`lsa, x + y + z nimaga teng?
A) 12 B) 10 C) 15 D)9
12. To`g`ri to`rtburchakning yuzi 400 ga, tomonlarining nisbati 4 : 1 ga teng. To`rtburchakning
perimetrini toping.
A) 100 B) 200 C) 120 D) 150
13. Ikki to`gri chiziqning kesishishidan hosil bo`lgan uchta burchak yig`indisi 265˚ .Shu
burchaklarning kattasini toping.
A) 110˚ B) 95˚ C) 105˚ D) 150˚
14. Kvadratning tomoni necha marta kamaytirilsa, yuzi 4 marta kichrayadi?
A) 1,5 B) 2 C) 2,5 D) 3,5
15. Rombning dioganali tomoni bilan 25˚ li burchak hosil qiladi. Romb katta burchagini
toping.
A) 165˚ B) 150˚ C) 130˚ D) 120˚
16. Parallelogrammning dioganali tomonlari tomonlari bilan 20˚ va 50˚ li burchak
hosil qiladi . Parallelogrammning katta burchagini toping.
A) 100˚ B) 145˚ C) 110˚ D) 145˚
17. ABCD to`g`ri to`rtburchakda S<sub>1</sub> = 2 , S<sub>2</sub> = 8 S<sub>3</sub> = 3 bo`lsa, S₄ ni toping.

S1	S2
S3	S4

A) 9 B) 10 C) 8 D) 12
18. Parallelogrammning bir tomoni ikkinchisidan to‘rt marta kam bo‘lib, perimetri 25 sm bo‘lsa, uning tomonlarini aniqlang.
а)4 ,5 sm va 8 sm; b) 2,5 va 11,5 sm; c) 5,5 sm va 7sm; d) 2,5 sm va 10 sm.
19.Rombning burchaklaridan biri ikkinchisidan 30^о ortiq bo‘lsa, uning rombning barcha burchaklarini aniqlang.
а) 78^о, 102^о, 78^о, 102^о; b) 74^о, 106^о, 74^о, 106^о; c) 72^о,108^о, 72^о,108^о. d) 75^о,105^о, 75^о,105^о.
20. ABC uchburchakning tomonlari 7 sm, 8 sm va 10 smga teng bo‘lib, barcha o‘rta chiziqlari o‘tkazilgan. O‘rta chiziqlardan hosil bo‘lgan uchburchakning perimetrini aniqlang .
а) 12,5 sm; b) 11,5 sm;
c) 12,6 sm; d) 16,5 sm.