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6-sinf Matematika olimpiada №1

InfoMaster

Aprel 29, 2022

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6-sinf Matematika olimpiada №1

2019-yil bilimlar bellashuvida tushgan savollar

1 / 25

1. 4(n-1)єN son 1, 2, 3, 4, 5, 6, 8, 10 va 20 ga qoldiqsiz bo’linsa, n ning eng kichik natural qiymatini toping.

A) 28

B) 31

C) 25

D) 27

2 / 25

2. 11 ga karrali barcha ikki xonali sonlarning o`rta arifmetigini toping ?

A) 50

B) 65

C) 55

D) 60

3 / 25

3. Uchta sonning uchinchisi ikkinchisidan nechta ortiq bo`lsa,ikkinchisi birinchisidan shuncha ortiq , bu sonlardan ikkita kichigining ko`paymasi 378, ikkita kattasining ko`paymasi 504 ekanligi ma`lum , shu uchta sondan birinchisini toping

A) 24

B) 12

C) 18

D) 17

4 / 25

4. a,b,c-natural sonlar. Agar a∙b=41 b∙c=82 bo’lsa, a+b+c ni hisoblang.

A) 44

B) 44 yoki 124

C) 43

D) 124

5 / 25

5. tenglamadan x ni toping

A) 11/6

B) 5/4

C) 7/5

D) 4/5

6 / 25

6. Ratsional ifodani kanonik ko’rinishga keltiring

A) (1+x)/(1+2x)

B) (1+2x)/(1-x)

C) (1-x)/(1+2x)

D) 1/2

7 / 25

7. Kubning barcha qirralari yig’indisi36 sm. Kubning sirtining yuzini toping.

A) 42

B) 27

C) 54

D) 126

8 / 25

8. Ishchi har kuni kunlik rejada ko’satilganidan 25 ta detal ortiq yasab, uch kunda rejadagi 7 kunga mo’ljallanganidan 15 ta ortiq detal yasadi. Ishchi har kuni nechtadan detal yasashi kerak edi ?

A) 44

B) 40

C) 15

D) 47

9 / 25

9. 32 dan 62,4 necha foiz ortiq?

A) 89.5

B) 85

C) 90

D) 95

10 / 25

10. Qirqinchi va uch yuz yetmish oltinchi natural sonlar orasida nechta natural son bor?

A) 334

B) 335

C) 337

D) 336

11 / 25

11. Tub sonlar ichida 3 ga bo’linadiganlari nechta?

A) 1ta

B) 2ta

C) cheksiz ko’p

D) yo’q

12 / 25

12. 1 dan 110 gacha bo’lgan sonlar ichida 3 ga ham, 5 ga ham bo’linmaydiganlari nechta?

A) 56

B) 60

C) 64

D) 38

13 / 25

13. n, n+3, n+4, n+5, n+6, n+8, n+10, n+12, n+15 sonlarining o’rtadagisi 10 gateng bo’lsa, ushbu barcha sonlar yig’indisini toping.

A) 88

B) 99

C) 93

D) 95

14 / 25

14. Usta ishnig 0,75 qismini 17/4 soatda bajaradi. Shu ishning 4/5 qismini qancha vaqtda bajaradi?

A) 67/15

B) 31/85

C) 68/15

D) 11/5

15 / 25

15. 3².8¹⁶.5⁴⁹ ko`paytma necha xonali son ?

A) 50

B) 52

C) 37

D) 46

16 / 25

16. x va y sonlar ayirmasining uchlanganini yozing va shu ifodaning x=-0,37 va y=-0,42 bo`lganida son qiymatini toping.

A) 0,15

B) 0,12

C) -0,79

D) -0,15

17 / 25

17. ni hisoblang

A) 5/14

B) 19/56

C) 6/13

D) 13/17

18 / 25

18. Dastlabki 200 ta natural sonlar ichida nechta bir raqami qatnashadi?

A) 140ta

B) 160ta

C) 180ta

D) 50ta

19 / 25

19. 2 ta ketma-ket toq sonlar yig`indisi quydagilardan qaysi biri albatta bo`linadi?

A) 6

B) 5

C) 3

D) 4

20 / 25

20. Akrom bog’dan bir nechta olma uzib chiqdi. Olmalarning 1/3 qismini va yana bir donasini ukasiga, qolgan olmalarning 1/3 qismini va yana bir donasini esa singlisiga berdi. Shunda uning o’zida 5 dona olma qolgan bo’lsa, Akrom bog’dan nechta olma uzib chiqqan?

A) 12ta

B) 20ta

C) 15ta

D) 16ta

21 / 25

21. Yarmining yarmi, yarmdan yarimga ortiq bo’lgan sonning uchlangangini toping.

A) 6

B) 15

C) 24

D) 12

22 / 25

22. 1dan 10 gacha bo’lgan sonlar ichida nechta mukammal son mavjud?

A) 7ta

B) 6ta

C) 4ta

D) 1ta

23 / 25

23. 5100 soning tub bo’luvchilari yig’indisini toping.

A) 27

B) 151

C) 14880

D) 28

24 / 25

24. Ishchi har kunlik rejada ko`rsatilganidan 25 ta detal ortiq yasab , uch kunda rejadagi 7 kunga mo`ljallanganidan 15 ta ortiq detal yasadi. Ishchi har kuni nechta detal yasagan ?

A) 44

B) 40

C) 47

D) 15

25 / 25

25. Hisoblang