6-sinf ii-chorak

8-sinf. Testlar.

1.Ifodaning qiymatini toping. a³· b² · c² , agar a = -1; b = -3; c =2 bo’lsa

A)36 B)-36 C)27 D)28

2.Tenglamani yeching: x · (x +2) = 0

A) 0 va -2 B) -2 C)-2 va 1; D) 0.

3.Agar a –b = -2,3 bo’lsa, a va b ni taqqoslang.

A) a =b B)a < b C) a> b.

4.Tengsizlikni ikki tomonini (-5)ga bo’ling. -25 > -30

A) 5 <6 B)-5<6 C)-5 <-6 D)5 > -6

5.Matoning narxi 20% pasaytirildi. Ma’lum vaqtdan keyin yangi narxi ham 25% pasaytirildi. Matoning narxi jami necha protsentga kamaygan?

A)40% B)45% C)50% D)5%

6.Agar B (3;6) nuqta y = kx +2 funksiya grafigiga tegishli bo’lsa, k-ni toping.

A) B) C) D)

7.Sistema nechta yechimga ega? x +y =13

x · y =30

A)1 B)2 C)cheksiz ko’p D)yechimi yo’q.

8.Agar x va y sistema yechimi bo’lsa x · y ni toping. 3x +2y =8

x +2y=4

A)4 B)2 C)3 D)6.

9.Sistemaning yechimi koordinata tekisligining qaysi choragida yotadi?

2x - y =3

2y+x=14

A)II ch B)I ch C)IIIch D)IVch.

10.Tengsizliklar sistemasini yeching. 5· (x+1) – x > 2x +2

4· (x+1) -2 < 2 ·(2x+1) –x.

A)(-1,5; 0) B)[ -1,5; 0) C)(-1,5 ;0 ] D)yechimi yo’q.

11.Tenglamani yeching: | 4 -5x | = 5

A) 0,2 ;1,8 B)-0,2; -1,8 C) -0,2; 1,8 D)0,5; 1,8.

12.Tengsizlikni yeching: |4x+1| ≥ 3

A) (-∞; -1) B) (-∞; -1] [ 0,5; ∞) C) [0,5; ∞) D) (-1; 0,5)

13.Qaysi juftlik o’zaro tub sonlardan iborat?

A)(8; 14) B) (11;22) C)(12;35) D)(12;34)

14.Hovlida yurgan it va tovuqlarning oyoqlari soni 42 ta, boshlari soni esa 15ta. Hovlida nechta it bor?

A)6 B)9 C)8 D)7.

15.Rombning diagonallari 8 va 6 sm ga teng bo’lsa, Romb perimetrini toping.

A)40 B)20 C)30 D)10

16.To’g’rito’rtburchak diagonallari bilan to’rtta uchburchakka ajratildi. Bitta uchburchak yuzi 27ga teng. To’rtburchak yuzini toping.

A)112 B)108 C)111 D)96

17.Uchburchak burchaklarining nisbati 1 : 2 : 3 katta burchakni toping:

A)90^o B)80^o C)110^o D)100^o

18.Qo’shni burchaklardan biri ikkinchisidan 3 marta katta, kichik burchakni toping?

A)55^o B)45^o C)65^o D)30^o