Barcha fanlardan online testlar

Matematika olimpiada Tuman 2020-2021 o'quv yili

9-sinf Matematika olimpiada №1

InfoMaster

Avgust 23, 2024

10 Ko'rishlar 0

SaqlashSaqlanganOlib tashlandi 0

9-sinf Matematika olimpiada №1

2020-2021 o'quv yil tuman bosqichida tushgan savollar

1 / 24

1. stemadan ni toping.

A) 3/7

B) 7/11

C) 7/3

D) 11/7

2 / 24

2. Rombning diagonallari 6 va 8 ga teng bo‘lsa, uning tomonini toping.

A) 5

B) 8

C) 3

D) 6

3 / 24

3. Agar bo‘lsa, ni hisoblang.

A) 3

B) -4

C) 4

D) ±4

4 / 24

4. Agar bo‘lsa, ko‘paytmani hisoblang.

A) 1/35

B) 31/35

C) -1

D) 1/33

5 / 24

5. Geometrik progressiyada dastlabki to‘rtta hadlari mos ravishda 6; 24; 96; bo‘lsa, ni toping.

A) 22

B) 16

C) 14

D) 15

6 / 24

6. Hisoblang:

A) 1,5

B) 1

C) 5

D) 0,5

7 / 24

7. Parallellogrammning 5 ga teng bo‘lgan diagonali uning 12 ga teng bo‘lgan tomoniga perpendikulyar. Parallelogrammning perimetrini toping.

A) 48

B) 50

C) 34

D) 44

8 / 24

8. Abituriyentga 36 ta masala berildi. To‘g‘ri yechilgan har biriga 3 ball beriladi. Noto‘g‘risiga 2 ball chegiriladi. 88 ball to‘plashi uchun o‘quvchi nechta masalani to‘g‘ri yechishi kerak?

A) 38

B) 34

C) 30

D) 32

9 / 24

9. 60⁰ li burchakka bir-biriga tashqaridan urinuvchi ikkita aylana ichki chizilgan. Kichik aylananing radiusi ga teng. Katta aylananing radiusini toping.

A) 3r

B) 2r

C) 5r

D) 4r

10 / 24

10. Tenglamaning natural sonlardagi yechimida ni toping:

A) 5

B) 3

C) 2

D) 4

11 / 24

11. Uchburchakning perimetri 24 sm ga teng bo‘lib, uning tomonlari uzunliklari arifmetik progressiya tashkil etadi. Shu uchburchakning kichik tomoni 6 sm bo‘lsa, uchburchak turini aniqlang.

A) O’tkir burchakli

B) Bunday uchburchak yo’q

C) O’tmas burchakli

D) To‘g‘ri burchakli

12 / 24

12. ifodani a=4, b=5 bo‘lgandagi qiymatini toping.

A) -1

B) 2

C) 1

D) 0

13 / 24

13. Asoslari 18 va 12 ga teng bo‘lgan teng yonli trapetsiyaning diagonallari o‘zaro perpendikulyar. Trapetsiyaning yuzini toping

A) 150

B) 400

C) 225

D) 125

14 / 24

14. Agar (3-a)(3-b)(3-c)=(3+a)(3+b)(3+c) bo‘lsa, $(ab)^{-1}+(bc)^{-1}+(ac)^{-1}$ ni hisoblang. (Bunda $abc\neq 0$ ).

A) 1/9

B) -1/3

C) -1/9

D) 1/27

15 / 24

15. bo‘lsa, ifodaning qiymatini toping

A) 13/16

B) 15/16

C) 2/3

D) 3/16

16 / 24

16. Tarkibida 85% suv bo‘lgan 0,5 t sellyuloza qorishmasida 75% suv bo‘lgan qorishma olish uchun necha kg suvni bug‘lantirish kerak?

A) 300

B) 200

C) 100

D) 400

17 / 24

17. Hovuzga uchta quvur o‘tkazilgan. Birinchisi hovuzni 12 soatda, ikkinchisi 8 soatda to‘ldiradi. Uchinchisi hovuzni 1 sutkada bo‘shatadi. Agar uchala quvur birgalikda ochib qo‘yilsa, bo‘sh hovuzning yarmi qancha vaqt(soat)da to‘ladi?

A) 3

B) 2

C) 2,5

D) 1,5

18 / 24

18. Tenglamani yeching: |x+6|=|x+10|

A) 6

B) 4

C) -8

D) -6

19 / 24

19. Ifodaning eng kichik qiymatini toping:

A) 4

B) -12

C) -4

D) 12

20 / 24

20. To‘g‘ri burchakli uchburchakka ichki chizilgan aylana urinish nuqtasida gipotenuzani 5 va 12 ga teng kesmalarga ajratadi. Uchburchak yuzini toping

A) 48

B) 65

C) 60

D) 35

21 / 24

21. Teng yonli trapetsiyaning diagonali uni ikkita teng yonli uchburchakka ajratadi. Trapetsiyaning burchaklarini toping.

1. $82^{0},98^{0}$