7-sinf " Algebra" fanida Kirish testi

7-sinf “ Algebra“ fanida Kirish testi
1. Uchta sonning o`rta arifmetigi 12,5 ga teng. Bu 3 ta son qatoriga yana bir son qo`shib, o`rta arifmetik qiymat hisoblangan edi, u 13,2 ga teng chiqdi. Qo`shilgan son nechaga teng ?
A) 15,3 B) 14,6 C) 13,3 D) 12,85 E) 37,5.
2. Kubning barcha qirralari yig`indisi 48 sm ga teng. Kub sirtining yuzini toping.
A) 96 sm² B) 24 sm² C) 192 sm² D) 48 sm² E) 56 sm²
3. ni hisoblang.
A) B) C) 1 D) E) 0
4. Kamayuvchi 36 taga ortib, ayriluvchi 16 taga ortsa, ayirma qanday o`zgaradi ?
A) 52 taga ortadi B) 20 taga ortadi C) o`zgarmaydi
D) 20 taga kamayadi E) 52 taga kamayadi.
5. Haydovchi yo`lning 0,65 qismini o`tgach hisoblab ko`rsa, yo`lning yarmidan 30 km o`tibdi. Avtomobil yana necha kilometr yo`l yursa, manzilga yetadi ?
A) 19,5 km B) 60 km C) 130 km D) 200 km E) 70 km
6. Hisoblang: 4,028 : 0,19 + 2,4 · 1,5.
A) 34,8 B) 24,8 C) 21,2 D) 36,1 E) 24,08.
7. A va B shaharlar orasidagi masofa 520 km. Bu shaharlardan bir vaqtda bir – biriga qarab ikkita avtomobil yo`lga chiqdi. Birinchisining tezligi 75 km/soat, ikkinchisining tezligi 80 km/soat. 2,4 soatdan so`ng ular orasidagi masofa necha kilometr bo`ladi ?
A) 372 km B) 148 km C) 158 km D) 155 km E) 248 km.
8. Uchta sonning o`rta arifmetigi 12,5 ga teng. Bu 3 ta son qatoriga yana bir son qo`shib, o`rta arifmetik qiymat hisoblangan edi, u 13,2 ga teng chiqdi. Qo`shilgan son nechaga teng ?
A) 15,3 B) 14,6 C) 13,3 D) 12,85 E) 37,5.
9. Mashina soatiga 72 km tezlik bilan 3 soat-u 20 minut yurdi. U shu masofani 2 soat-u 40 minutda o`tishi uchun qanday tezlik bilan yurishi kerak ?
A) 96 km/soat B) 82 km/soat C) 100 km/soat D) 85 km/soat E) 90 km/soat
10. Ombordagi ozuqa 4 ta qo`yga 12 kunga yetadi. Shu ozuqa 3 ta qo`yga necha kunga yetadi?
A) 9 kunga B) 16 kunga C) 10 kunga D) 18 kunga E) 15 kunga.
11. Ikki shahar orasidagi masofa 480 km. Xaritaning masshtabi 1:1000000.
Xaritada bu shaharlar orasidagi masofa qancha bo`ladi?
A) 4,8 sm B) 24 sm C) 96 sm D) 48 sm E) 480 sm.
12. 14 va 80 sonlarining protsent nisbatini toping.
A) 25 % B) 5 % С) 16 % D) 80 % E) 20 %
13. 360 ning 12 % iga 10 % i 14 bo`lgan sonni qo`shing.
A) 57,2 B) 572 C) 183,2 D) 18,32 E) 193,2
14. 16 va 80 sonlarining protsent nisbatini toping.
A) 25 % B) 5 % С) 16 % D) 80 % E) 20 %
15. Qutida 3 xil rangli shar bor. Oq sharlar barcha sharlarning 32% ni tashkil qiladi. Qora sharlar qolgan sharlarning 25% ni tashkil qiladi. Agar qizil sharlar oq sharlardan 95 ta ko’p bo’lsa, qutida nechta oq shar bor?
A) 125 ta B) 95 ta C) 160 ta D) 150 ta

16. Arifmetik progressiyaning birinchi, to’rtinchi hamda yettinchi hadlari yig’indisi 45 ga teng. Bu progressiyaning uchinchi va beshinchi hadlari ko’paytmasi 209 ga teng bo’lsa, uning birinchi hadi va ayirmasi farqini toping.

A) -2 B) -1 C) 1 D) 2

17. Aylanada 𝐴 va 𝐵 nuqtalar, kichik 𝐴𝐵 yoyda 𝐷 nuqta, katta 𝐴𝐵 yoyda 𝐶 nuqta olingan. Agar 𝐴𝐶𝐵̌−𝐴𝐷𝐵̌=1000 bo’lsa, ∠𝐴𝐶𝐵=?

A) 500 B) 550 C) 600 D) 650

18. {𝑎𝑛} ketma-ketlik 𝑎𝑛=𝑛2−𝑛 formula bilan berilgan. Bu ketma ketlikning yigirmanchi hadini toping.

A) 380 B) 360 C) 400 D) 420
19. 4 : ( 2x + 5 ) = 2 : ( 3x – 2 ) tenglamaning ildizi x₀ bo`lsa, 4x₀ + 11 ifodaning son qiymarini toping.
A) -18 B) -20 C) 19 D) 20 E) 21
20. Ko`paytuvchilarga ajrating: ( a² + 25 )² – 100a²
A) (a-5)³(a+5) B) (a-5)(a+5)³ C) (a+5)⁴ – (10a)² D) (a-5)²(a+5) D) (a-5)²(a+5)²