Va 5 sonlarining ekukini ekubiga bo’linmasini toping. A 15 b c d 20

Test. EKUB va EKUK.
1. 15 va 25 sonlarining EKUKini EKUBiga bo’linmasini toping. A) 15 B) 5 C) 3 D) 20
2. EKUK (84,360,240) ni toping. A) 5040 B) 7550 C) 7560 D) 5460
3. Qaysi javobda 4500 soni tub ko’paytuvchilarga to’g’ri ajratilgan?
A) 2²•3²•5² B) 2³•3²•5³ C) 2²•3³•5² D) 2²•3²•5³
4. EKUB(70;56)=? A) 2 B) 7 C) 14 D) 28
5. EKUK(32;80)=? A) 320 B) 160 C) 240 D) 480
6. Karimning qadami 50 sm, Salimniki esa 60 sm. Qancha masofada ular qadami ilk bor ustma-ust tushadi?
A) 3000 sm B) 600 sm C) 1800 sm D) 3 metr
7. Mato 11 m dan yoki 13 m dan qilib sotilmoqchi. Mato parchasi ortib qolmasligi uchun to’pda eng kamida necha metr mato bo’lishi lozim?
A) 77 m B) 143 m C) 133 m D) 93 m
8. EKUB(30;45;135)=? A) 5 B) 3 C) 15 D) 30
9. EKUK(30;45;135)=? A) 210 B) 240 C) 270 D) 390
10. 3 ga, 4 ga, 5 ga bo’lganda 1 qoldiq qoladigan eng kichik natural sonni toping.
A) 51 B) 61 C) 71 D) 59
11.3 ga bo’lganda 1 qoldiq, 4 ga bo’lganda 2 qoldiq, 5 ga bo’lganda 3 qoldiq qoladigan eng kichik natural sonni toping. A) 58 B) 59 C) 60 D)61
12.540 va 840 ni EKUBini toping. A) 30 B) 120 C) 60 D) 80
13.567a6 soni a ning qanday qiymatida 8 ga bo’linadi. A) 5 B) 7 C) 6 D) 1
14. 80,120 va 60 sonlarning EKUBini EKUKiga qo‘shing. A) 200 B) 240 C) 260 D) 300
15. Tub sonlar qatoridan 17-tub sonni toping. A) 17 B) 59 C) 55 D)51
16. 15 ga karrali uch xonali sonlar nechta? A) 60 B) 66 C) 70 D) 50
17.128,160,60 sonlarining EKUKini EKUBiga ayirmasini toping. A) 1916 B) 1920 C) 1900 D) 1912
18. 144 sonining tub bo‘luvchilari yig‘indisini toping. A) 7 B) 9 C) 5 D) 10
19. 110 sonining tub bo’luvchilar ko’paytmasini toping. A) 110 B) 22 C) 55 D) 220
20. 48 sonining natural bo’luvchilar yig’indisini toping. A) 78 B) 120 C) 144 D) 124
21. 15 va 25 sonlari eng kichik umumiy karralisinining natural bo’luvchilari nechta? A) 6 B) 5 C) 2 D) 8
22. Quyidagi tasdiqlarning qaysilari to’g’ri?
1)Toq va juft sonlar doimo o’zaro tub; 2)Ikkita juft son o’zaro tub bo’la olmaydi; 3) Ikkita turli tub sonlar doim o’zaro tub;
4) Ikkita ketma-ket natural sonlar doim o’zaro tub; 5) 39 va 91 sonlari o’zaro tub.
A) 1; 3; 5 B) 4; 5 C) 2; 3; 5 D) 2; 3; 4
23.9, 10, 22 va 25 sonlari orasida nechta o’zaro tub sonlar jufti bor? A) 4 B) 3 C) 6 D) 5
24.Ikki sonning ko’paytmasi 294 ga, ularning eng katta umumiy bo’luvchisi 7 ga teng. Bu sonlarning eng kichik umumiy karralisini toping. A) 42 B) 52 C) 56 D) 49
25) Hisoblang: NBY(150)=? A) 352 B)372 C)400 D)435
26) Hisoblang: NBS(260)=? A)12 B)16 C)10 D)14
27)O’zaro tub bo’lgan sonlarni toping. A) (15;45) B) (17;91) C) (28;56) D) (17;53)
28) Tub sonlar deb qanday sonlarga aytiladi? A) faqat toq sonlarga bo’linuvchi sonlar B) 2 ga bo’linmaydigan sonlar C) faqat 1 ga va o’ziga bo’linuvchi sonlar D) toq sonlarga kiruvchi barcha sonlar
29) 50 gacha bo’lgan tub sonlar nechta? A)13 B)20 C)18 D)15
30) Hisoblang: NBS(300)=? A)18 B)20 C)16 D)24