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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. 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) 7

B) 4

C) 5

D) 6

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2. 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) 146km

B) 566km

C) 126km

D) 36km

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

A) 75

B) 73

C) 53

D) 83

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

A) 7425

B) 7445

C) 7245

D) 7275

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5. 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) 12

C) 15

D) 16

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6. 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) 50%

C) 80%

D) 30%

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

A) 280

B) 32

C) 270

D) 275

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

A) 12

B) 24

C) 32

D) 40

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9. 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) 167

B) 503

C) 936

D) 143

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

A) 19

B) 187/90

C) 7/30

D) 1,29

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

A) 60

B) 70

C) 50

D) 55

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12. 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) 10080

B) 10000

C) 1080

D) 10800

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13. Do`konda jami 0 ,96 t shakar bo`lib , birinchi kuni uning 1/3 qismi , ikkinchi kuni qolganing ½ qismi , uchinchi kuni esa qolganing 1/4 qismi va to`rtinchi kuni qolgan barcha shaker sotib bo`lingan bo`lsa , ikkinchi va uchinchi kunlari jami qancha shaker sotilgan ?

A) 550

B) 400

C) 500

D) 300

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14. Ifodaning qiymatini toping :

A) 664/49

B) 37/49

C) 96/59

D) 576/49

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15. Hisoblang :

A) 0

B) 1000

C) -4000

D) 1000

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16. 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) 106

B) 135

C) 108

D) 115

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17. Hisoblang:

A) 125/333

B) 33/56

C) 33/76

D) 15/28

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18. 3 ga bo`linmaydigan sonning kvadratidan bittaga kam bo`lgan son , qaysi songa qoldiqsiz bo`linadi?

A) 6

B) 3

C) 4

D) 2

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

A) 84 sm

B) 85 sm

C) 75 sm

D) 74 sm

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20. Hisoblang:

A) 4/27

B) 1/27

C) 2/27

D) 27/2

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

A) 8

B) 12

C) 11

D) 10

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22. Ikki sonning ayirmasi 30 ga teng , nisbati esa 3 ga teng . Shu sonlarni toping .

A) (46;16)

B) (42 ;12)

C) (55;25)

D) (45;15)

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23. 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) 167

B) 143

C) 503

D) 936

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24. 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) 20

B) 12

C) 16

D) 15

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25. 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) 760;900;1080

C) 760;980;1000

D) 750;900;1090