2–bob. Butun va ratsional sonlar butun sonlar ustida amallar

13. a,b,c musbat butun sonlar uchun tengliklar bajarilsa, x uch xonali sonning eng katta qiymatini toping.

A) 999 B) 944 C) 945 D) 976

14. Juft sonning o’zidan keyin keluvchi juft sonning uchlangani bilan yig’indisi 70 dan kichik. Ushbu shartni qanoatlantiruvchi juft sonlardan eng kattasini toping.

A) 12 B) 16 C) 14 D) 8

15. [0;300] kesmada 3 ga bo’linganda qoldiq 1 ga, 4 ga bo’linganda qoldiq 2 ga, 5 ga bo’linganda qoldiq 3 ga va 6 ga bo’linganda qoldiq 4 ga teng bo’ladigan natural sonlar nechta?

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

16. Agar ikkita tub sonlar yig’indisi yana tub son bo’lsa, bu sonlar ko’paytmasi qanday son bo’ladi?

A) toq B) juft C) tub D) BJT

17. Nechta p tub son uchun ifoda ham tub son bo’ladi?

A) 1 B) 2 C) 3 D) 4

18. Toq sonning o’zidan keyin keluvchi uchta toq son bilan yig’indisi 49 dan katta. Ushbu shartni qanoatlantiruvchi toq sonlardan eng kichigini toping.

A) 9 B) 15 C) 11 D) 13

19. ni hisoblang. Bu yerda [] va {} belgilar mos ravishda sonning butun va kasr qismi.

A) 1+e B) 1 C) 1 D)

20. a va b manfiy butun sonlar uchun a=b+4 va a+bc=13 bo’lsa, c ning eng katta qiymatini toping.

A) 17 B) 11 C) 15 D) 19

21. 2001 ta butun musbat sonning ko’paytmasi 105 ga, yig’indisi 2021 ga teng. Bu sonlarning eng kattasi nimaga teng?

A) 15 B) 105 C) 21 D) 35

22. Raqamlari yig’indisi 2001 ga teng bo’lgan eng kichik natural sonning birinchi raqami nimaga teng?

A) 4 B) 3 C) 2 D) 1

8. ODDIY KASRLAR USTIDA AMALLAR

1. ga teskari sonni toping.

A) 0,75 B) 1,5 C) D)

2. ni hisoblang.

A) B) C) D)

3. va sonlar orasida maxraji 108 ga teng bo’lgan nechta kasr son bor?

A) 15 B) 16 C) 14 D) 18

4. ni hisoblang.

A) B) C) D)

5. ning qismini toping.

A) B) C) D)

6. Hisoblang: .

A) B) C) D)