Kg mevaning tarkibida 80% suv bor. Bir necha kundan so`ng mevaning og`irligi 500 kg ga tushdi. Endi bu mevaning tarkibida necha foiz suv bor

1. 900 kg mevaning tarkibida 80% suv bor. Bir necha kundan so`ng mevaning og`irligi 500 kg ga tushdi. Endi bu mevaning tarkibida necha foiz suv bor?
A) 68 B) 62 C) 64 D) 66
2. Tenglamaning ildizlari yig`ndisini toping?

A) -6 B) 3 C) 0 D) 6
3. Arifmetik progressiya 26 haddan iborat. Agar a₆=-0,25 va a₂₁=- 1,25 bo`lsa, uning hadlari yig`ndisini toping?
A) -10,75 B) -9,75 C) -8,5 D) -19,5
4. x = , у = , z= bo'lsa,
|x-y|+|z-y|+|y-x-z| ifodani soddalashtiring.
А) -у В) x+z-2y С) x-z+y D) 2x-y
5. tenglamaning nechta ifdizi mavjud?
A) ildizi yo'q B) 1 C) 2 D) 4
6. a=0,2(223), b=0,22(23) va c=0,(2223) sonlarini o'sish tartibida.yozing.
A) cA) 15 B) ildizi yo`q C) 8 D) 22
8. Yettiga bo`lganda 4 qoldiq chiqadigan barcha ikki xonali sonlar yig`ndisini toping ?
A) 594 B) 698 C) 583 D) 689
9. Кasrning qiymati ga teng. Agar kasrning suratiga 15 maxrajiga 5 qo'shilsa, uning qiymati ga teng bo`lib qoladi. Kasrning maxraj va surati ayirmasini toping.
A) 4 B) 10 C)16 D) 14
10. Tuxumfurush 150 so`mdan 100 ta tuxum sotib oldi. Tuxumlardan 20 tasi sinib qoldi. Sotuvchi singan tuxumlarni 175 so'mdan, butunini 200 so'mdan sotdi. Bu tijoratda sotuvchi necha foiz foyda qilgan?
A) 25 % B) 27,(6) % C) 30 % D) 33,(3) %
11. 16-(2x-3)² ni ko`paytuvchilarga ajrating.
A)(2x-1) (7-2x) B)(2x+1) (7-2x) C)(2x-1) (2x+7) D)(2x+1) (2x-7)
12. Hisoblang: A)2 B)3 C)5 D)4
13. Nechta tub son 2≤ ≤3 tengsizlikni yechimi bo`ladi?
14. : 2 ni hisoblang. A) B) C) D)
15. Agar va bo`lsa, ning qiymatini toping.
A) 181 B)178 C)17 D)19
16. Tenglamaning ildizlari yig`ndisini toping ? A) 3 B) ildizi yo`q C) 4 D) 7
17.
A) 715 B) 875 C) -45 D) -95
18.
A) B) 2 C) 2 D)

19. bo`lsa

A) 18 B) 42 C) 36 D) 26
20. (2x-1)(x-1,5)=0 bo`lsa, 2x-1 qanday qiymatlar qabul qiladi?
A) faqat B) 2 yoki 0 C) 0 yoki 1,5 D) 0 yoki 6
21. Hisoblang
A) 25,75 B) 27,25 C) 29,75 D) 31,25
22. 24 sonining barcha natural bo`luvchilari yig`indisi ni toping?
A) 48 B) 60 C) 124 D) 108
23. x²+x-4=0 x₁³+x₂³=?
A) 3 B) 1 C) -13 D) 2
24. Ifodani soddalashtiring . A) x⁴-1 B) x²+1 C) x²-1 D) x⁴+1
25. Quyidagi teglamalardan qaysi biri ildizga ega emas ?
A) 10x²-12x+4=0 B) 6x²-11x+3=0 C) 18x²+24x+8=0 D) x²+x-6=0
26. tengsizlikning eng katta va eng kichik butun yechimlari ayirmasini toping.
A) 4 B) 3 C) 2 D) 5

27. ni hisoblang.

A)2 B) 3 C) 2 D)4
28. ni hisoblang.
A)1 B)1 C)1 D)1
29. A)6 B)7 C)8 D)5
30. Sistemani yeching .
A) (4;2)U (2;2) B) (-4;-2)U(-2;-4) C) (4;2)U(2;4)
31. tengsizlikning butun sonlardan iborat yechimlari nechta ?
A) 4 B) 5 C) 2 D) 3
32. 2xy=?
A) 1 B) 3 C) 4 D) 2
33. , bo`lsa x=? A)a B)a+b C)a-b D)ab