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

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)