Matematikadan testlar

4.Tub va murakkab sonlar.

1. 17

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

2. 16:a bo’linma a ning nechta natural qiymatida tub son bo’ladi?

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

3. a ning qanday eng kichik natural qiymatida a; a+4; a+12; a+24; a+40 sonlari tub sonlar bo’ladi?

A) 5 B) 11 C) 7 D) 13

4. Faqat tub sonli javobni toping.

A) 2,3,19,51 B) 7,13,23,33 C) 5,23,89,97 D) 61,67,69,71

5. 140 ning nechta tub bo’luvchisi bor?

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

6. Ketma-ket murakkab sonlar qatorini ko’rsating.

A) 32,33,34,35,36,37 B) 42,43,44,45,46,47

C) 91,92,93,94,95,96 D) 81,82,83,84,85,86

7. 200 dan kichik eng katta tub son qaysi ?

A) 193 B) 197 C) 199 D) 191

8. Noto’g’ri javobni toping.

A) 6 mukammal son B) 2 dan boshqa juft sonlar tub emas

C) Tub sonning kvadrati 3 ta bo’luvchiga ega

D) 2 ta tub son ko’paytmasi yana tub son bo’ladi.

9. Qaysi son 2 ta tub bo’luvchiga ega?

A) 4 B) 9 C) 10 D) 8

10. 7* ko’rinishidagi ikki xonali sonda ,,*” o’rniga qaysi raqamlar qo’yilsa, tub son hosil bo’ladi?

A) 1,5,9 B) 1,3,9 C) 5,7,9 D) 3,7,9