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5-sinf Matematika olimpiada №1

InfoMaster

Aprel 29, 2022

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5-sinf Matematika olimpiada №1

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1. Ikki sonning yi`g`indisi 150ga , shu sonlarning EKUBi 30 ga teng natural qiymatlaridagi yechimlar juftligi nechta ?

A) 2

B) 4

C) 3

D) 1

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2. p qanday tub son bo`lganda 71 p +1 biror natural sonnig kvadratiga teng bo`ladi ?

A) 83

B) 73

C) 53

D) 75

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3. Hisoblang :

A) 1000

B) 0

C) 1000

D) -4000

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4. Teplohod ikki pristan oralig`idagi masofa daryo oqimi bo`yicha 7 soat , oqimga qarshi 9 soat o`tadi . Agar oqimning tezligi 2 km/s bo`lsa pristanlar orasidagi masofani aniqlang ?

A) 566km

B) 36km

C) 126km

D) 146km

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5. 1+2-3+4+5-6+7+8-9+…208+209-210 ni hisoblang

A) 7245

B) 7275

C) 7445

D) 7425

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6. Ifodaning qiymatini toping :

A) 37/49

B) 576/49

C) 664/49

D) 96/59

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7. Idish to`g`ri burchakli parallelepiped shaklida bo`ib , uning bo`yi 60 sm eni 45 sm va balandligi 47 sm ga teng. Agar idishdagi suv sathi 40 sm balandlikda bo`lsa , unda necha litr suv bor ?

A) 108

B) 106

C) 135

D) 115

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8. Agar uch xonali sondan 6 ni ayirsak ayirma 7 ga bo`linadi , 7 ni ayirsak ayirma 8 ga bo`linadi , 8 ni ayirsak ayirma 9 ga bo`linadi .Bu sonni toping .

A) 143

B) 503

C) 167

D) 936

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9. Ruchka qalamdan ikki marta qimmat , o`chirg`ich esa qalamdan uch marta arzon . Agar ruchka , qalam va o`chirg`ich 2000 so`m bo`lsa qalam necha so`m turadi .

A) 550

B) 600

C) 500

D) 400

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10. x soni y ning p foiziga teng .y soni x ning 4p foiziga teng . p ni toping ?

A) 70

B) 60

C) 55

D) 50

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11. Qanday ikki xonali son o`z raqamlar yig`indisidan 4 marta , ko`paytmasidan 3 marta katta ?

A) 32

B) 40

C) 12

D) 24

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

A) 12

B) 16

C) 15

D) 20

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13. Zavodning 3 ta sexida 2740 nafar ishchi ishlaydi . Ikkinchi sexda birinchisiga nisbatan 140 ta ko`p ishchi , uchinchi sexda esa ikkinchisiga nisbatan 1 ,2 marta ko`p ishchi ishlaydi . har bir sexda qanchadan ishchi ishlaydi ?

A) 790;900;1050

B) 750;900;1090

C) 760;900;1080

D) 760;980;1000

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14. Hisoblang:

A) 33/76

B) 15/28

C) 33/56

D) 125/333

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15. Birdan o`ngacha bo`lgan natural sonlar ko`paytmasining natural bo`luvchilari sonini toping ?

A) 32

B) 270

C) 275

D) 280

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16. Kubning sirti 294 sm² ga teng . Uning barcha qirralari yig`indisini toping ?

A) 84 sm

B) 75 sm

C) 74 sm

D) 85 sm

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17. Basseyn ikkita quvur bilan 7,5 soatda to`ldiriladi. Birinchi quvurning yolg`iz o`zi basseynni ikkinchi quvurning yolg`iz o`zi to`ldirganidan 8 soat tezroq to`ldiradi . Birinchi quvurning alohida o`zi basseynni necha soatda to`ldira oladi ?

A) 15,5

B) 16

C) 15

D) 12

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18. Hisoblang:

A) 27/2

B) 4/27

C) 2/27

D) 1/27

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19. Parovoz ma`lum masofani 2,25 sutkada o`tishi kerak edi , lekin u har soatda mo`ljaldagidan 25 km ko`p yo`l o`tganligi va shuning uchun mo`ljallangan masofani 2 sutkada o`tganligi ma`lum bo`ldi .Paravoz qancha masofa o`tgan ?

A) 1080

B) 10800

C) 10000

D) 10080

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20. x , y , z Natural sonlar uchun 28x+30y+31z =365 munosabat o`rinli bo`lsa x+y+z ni toping .

A) 10

B) 11

C) 12

D) 8

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21. Bir odam avval maoshining yarmini keyin oltidan bir qismini , keyinroq esa qolganing yarmini oldi . Agar olgan pulining beshdan bir qismi 350 so` m bo`lsa , u odam yana qancha olishi kerak ?

A) 2100 So`m

B) 1750 So`m

C) 3155 So`m

D) 10500 So`m

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22. Hisoblang : 1,1(6)+0,12(3)

A) 19

B) 187/90

C) 1,29

D) 7/30

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23. Otasi 41 yoshda katta o`g`il 13 yoshda , qizi 10 yoshda kichik o`g`li 6 yoshda . Necha yildan keyin otasining yoshi hamma bolalari yoshlarining yi`gi`indisiga teng bo`ladi ?

A) 4

B) 6

C) 7

D) 5

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24. Agar uch xonali sondan 6 ni ayirsak ayirma 7 ga bo`linadi , 7 ni ayirsak ayirma 8 ga bo`linadi , 8 ni ayirsak ayirma 9 ga bo`linadi .Bu sonni toping .

A) 936

B) 503

C) 143

D) 167

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25. Sotuvchi kilosi 1500 so`mdan 100 kg olma sotib oldi . 20 kg maydaroq olmalarni sotuvchi 1750 so`mdan , qolganlarini 2000 so`mdan sotdi . Bu tijoratda sotuvchi necha foiz foyda qilgan ?

A) 40%

B) 30%

C) 80%

D) 50%