Matematikadan testlar

3.Tub va murakkab sonlar.

1. 15

A) 4 ta B) 5 ta C) 6 ta D) 7 ta

2. 43 a ko’paytma a ning nechta natural qiymatida tub son bo’ladi?

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

3. a, a+4, a+6, a+12, a+16 sonlari a ning qanday eng kichik natural qiymatida tub sonlar bo’ladi?

A) 1 B) 3 C) 5 D) 7

4. Faqat tub sonli javobni toping.

A) 1,3,5,7 B) 0,2,7,13 C) 13,17,41,169 D) 43,47,53,59

5. 210 sonining nechta tub bo’luvchisi bor?

A) 3 ta B) 4 ta C) 5 ta D) 6 ta

6. Eng katta ikki xonali egizak tub sonlar juftligini ko’rsating.

A) (91;93) B) (97;99) C) (71;73) D) (87;89)

7. Murakkab sonlar qatorini ko’rsating.

A) 10,12,15,17 B) 100,121,125,143 C) 12,14,16,19 D) 25,31,49,51

8. Noto’g’ri javobni toping.

A) Egizak tub sonlar ketma-ket toq sonlar bo’lishi mumkin B) 28 mukammal son

C) Murakkab sonning bo’luvchilari 2 tadan kam emas. D) 2 eng kichik tub son.

9. 2ⁿ-1 soni n raqamining nechta qiymatida tub son bo’ladi?

A) 4 ta B) 3 ta C) 6 ta D) 5 ta

10. a, a+2, a+3, a+4, a+9 sonlari a ning qaysi qiymatida murakkab sonlar tashkil etadi?

A) 4 B) 8 C) 14 D) 6