Test B: Matematika

3ab D)  2d

12. 12 − 4x < x
14. Agar xy = 5 va x + y = −5 bo‘lsa, (3 + 2x)2 · y + (3 + 2y)² · x ifodaning qiymatini toping.
A) 5 B) −5 C) 0 D) −25
15. Kasrning maxraji suratidan 8 ga ortiq bo‘lib, ularning yig‘indisi 30 ga teng. Bu kasrning suratidan 1 ni ayirib, maxrajiga 1 ni qo‘shsak, kasrning qiymati quyidagilardan qaysi biriga teng bo‘ladi?
A) 5/6 B) 3/ 7 C) 2/ 5 D) 1/2
16. 3 dm×4 dm×8 dm o‘lchamli to‘g‘ri burchakli parallelepipedlardan nechtasini terib eng kichik hajmli kub hosil qilish mumkin?
A) 144 B) 216 C) 72 D) 180
17. Ikkita natural sonning yig‘indisi 15 ga teng bo‘lsa, ularning ko‘paytmasi quyidagi sonlardan qaysi biriga teng bo‘lishi mumkin?
A) 36 B) 37 C) 34 D) 35
18. Agar a (x − 2)2 + b (x − 2c) = 2 (x² − x + 16) tenglik ayniyat bo‘lsa, a + b + c ning qiymatini toping.
A) 2 B) −2 C) 6 D) 8
19. Teng yonli trapetsiyaning katta asosi 25 cm va perimetri 55 cm. Agar trapetsiyaning diagonali uning
o‘tkir burchagini teng ikkiga bo‘lsa, trapetsiyaning o‘rta chizig‘ini (cm) toping.
A) 16 B) 18 C) 17,5 D) 17
x y 2
 y x 2 3
20. x va y sonlar  tenglamalar sistemasini qanoatlantirsa, 3x + 1 ning eng katta qiymatini
^x y 1 ¹
 3
toping.
A) 3 B) 2 C) 10 D) 7
21. Agar charxpalak 5 minutda 23 marta aylansa, u 12 minutda necha marta aylanadi?
A) 54 B) 53 C) 61 D) 57
22. Ixtiyoriy uchtasi bir to‘g‘ri chiziqda yotmagan 10 ta nuqtani o‘zaro tutashtirib ko‘pi bilan nechta har xil kesma hosil qilish mumkin?
A) 55 B) 90 C) 45 D) 10
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