Quiz about math

Question 1

0,789345623 equivale a

Accepted Answer

7,89x $$10^{-1\ }$$

Answer

$$7,89x10^{-2}$$

Answer

7 $$7,89x10^{1\ }$$

Question 2

il 20% di 50 ciliegie sono amare, quante sono le buone?

Accepted Answer

40

Answer

10

Answer

25

Answer

42

Question 3

3*5 da come risultato

Accepted Answer

15

Answer

3 alla quinta

Answer

243

Question 4

cosa vuol dire scomporre in fattori primi

Accepted Answer

ridurre ai minimi termini

Answer

dividere

Question 5

scomponi 68

Accepted Answer

$$2^{2\ } imes17$$

Answer

$$2^3 imes17 imes1$$

Question 6

2,33 equivale a

Accepted Answer

$$\frac{233}{100}$$

Answer

$$\frac{23}{99}$$

Answer

$$\frac{233}{10}$$

Question 7

$$\frac{2^4}{2^3}:2^3$$

Accepted Answer

$$\frac{1}{2^2}$$

Answer

$$\frac{1}{2^{-2}}$$

Question 8

(3+6):(5x3)

Accepted Answer

3/5

Answer

3

Answer

9

Question 9

$$\left(x^2+7x+12\right)\ \ la\ scomposizione\ è$$

Accepted Answer

(x+3)(x+4)

Answer

(x-3)(x-4)

Question 10

7x+3-6x=2x+4 calcola x

Accepted Answer

-1

Answer

1

Answer

-2

Question 11

(2x+2)(2x-2) equivale a

Accepted Answer

$$4x^2-4$$

Answer

$$\left(4^2-4\right)$$

Question 12

$$-3^3$$

Accepted Answer

-27

Answer

27

Question 13

3km approssima alla terza cifra decimale

Accepted Answer

1,864 miglia

Answer

3,825 miglia

Answer

2,878 miglia

Question 14

indica un'equazione lineare

Accepted Answer

x+y=0

Answer

$$x^2-1=0$$

Answer

0=0

Question 15

$$\left(\frac{1}{3}+\frac{1}{6}+2\right):6$$

Accepted Answer

5/12

Answer

5/2

Question 16

m.c.m tra 4,10,15

Accepted Answer

60

Answer

10

Answer

25

Question 17

$$\left(x+3\right)^3$$

Accepted Answer

$$x^{3\ }+27+9x^2+27x$$

Answer

$$x^{3\ }+27-9x^2-27x$$

Question 18

calcola y da questa :
x+y=4

Accepted Answer

4-x

Answer

x+4

Question 19

le soluzioni di $$x^2+\ 4x\ -21\ \ \ attenzione\ cambi\ segno.$$

Accepted Answer

+3 -7

Answer

-3 +7

Answer

3 +7

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