Test Ikkita qo’shiluvchining har biri k

Test

1. 
   Ikkita qo’shiluvchining har biri k natural songa bo’linsa, u holda bu ikki sonning ayirmasi k songa bo’linadimi?
   

A)bo’linmaydi C)ba’zi hollarda bo’linadi
B)albatta bo’linadin D)to’g’ri javob berilmagan

2. 
   a raqamining qanday qiymatlarida A=6a2+73a yig’indi 3 ga qoldiqsiz bo’linadi:
   

A)1,3,7,9 C)0,3,5
B)1,3,5,7 D)0,3,6,9

3. 
   Barcha to’rt xonali sonlar orasida 45 ga bo’linadiganlari nechta:
   

A)222ta C)221ta
B)220ta D)223ta

4. 
   To`g’ri to`rtburchak perimetri 2 m ga teng. Eni bo`yidan 2 dm qisqa.Shu to`g’ri to`rtburchkning yuzini toping:
   

A) 24 dm2 C) 2 m2
B) 2,4 dm2 D) 4 dm2

5. 
   400 gramm eritmada 50 gramm tuz bor. 160 gramm shunday eritmada qancha tuz bor?
   

1. 
   A) 19 gramm C) 20 gramm
   
2. 
   B) 24 gramm D) 22 gramm
   

6. 
   Mashina 70km/soat tezlik bilan 6 soat yo`l yurdi . U shu masofani 5 soatda o`tishi uchun qanday tezlik bilan yurishi kerak ?
   

A) 75 km/soat C) 84 km/ soat
B) 81 km/ soat D)80 km/ soat

7. 
   100 m3 havoda 21 m3 kislorod bor . Eni 8m, bo`yi enidan 25% ortiq, balandligi 3,25 m bo`lgan xonada necha kubametr kislorod bor:
   

A)26 m3 C) 260 m3
B) 50 m3 D) 54,6 m3 ?

8. 
   Agar a, b, c – musbat butun sonlar bo`lib, 7b = 5c, 7a = 2c, 5a = 2b bo`lsa, a + b+ c yig’indining qiymatini toping:
   

A) 14 C) 14,5
B) 13 D)13,5

9. 
   Uchta sonning o`rta arifmetigi ( - 19,5) ga teng. Boshqa uchta sonning o`rta arifmetigi 12 ga teng. SHu 6 ta sonning o`rta arifmetigini toping.
   

A)- 15,75 C)- 3,75
B) 15,75 D)3,75

10. 
    Tenglamani yeching: 7*(2-3x) – 5*(3-4x) =14.
    

A) – 15 C) – 12,5
B) 14,3 D) 15

11. 
    Uchburchakning bir tomoni ikkinchi tomonidan 3 sm qisqa, uchinchi tomonidan 2 sm uzun. Agar uchburchakning perimetri 52 sm bo`lsa, uning tomonlari uzunligini toping :
    

A) 17 sm, 17 sm, 18sm C) 17 sm, 20 sm, 15 sm
B) 10 sm, 26 sm, 16 sm D) 18 sm, 20 sm, 14 sm

12. 
    1234…798081 soni necha xonali?
    

A)90 C)81
B)152 D)153

13. 
    40 dan kichik tub sonlar nechta?
    

A)13 C)14
B)12 D)11

14. 
    2 ta ketma-ket toq sonlar yig’indisi quyidagilardan qaysi biriga albatta bo’linadi?
    

A)3 C)4
B)5 D)6

15. 
    69 ni bo’lganda, qoldiq 9 chiqadigan barcha natural sonlarning yig’indisini toping.
    

A)147 C)137
B)87 D)85