general exercises on prep 3

 $\sqrt{36}\ +\ \sqrt{16}\ =\ ............$  

• 10

• 24

• 52

• 100

the middle proportional between 3 , 27 is .............

• 9

• - 9

• 
  

  $\pm\ 9$
  

• $\pm\ 1$

 $if\ f\ \left(x\right)=2\ ,\ \ f\left(2\right)+f\left(-\ 2\right)\ =\ .........$  

• 0

• 4

• - 4

• 1

the positive number which twice its square equals 50 is .........

• 5

• 10

• 25

• 100

 $If\ x+y=xy=5\ ,\ then\ x^2\ y\ +\ y\ x^2\ =\ .......$  

• 10

• 15

• 20

• 25

The simplest and easiest method of measuring dispersion is ...........

• the range

• the standard deviation

• the arithmetic mean

• the mode

the slope of x - axis is ...........

• 0

• 1

• undefined

• negative

the equation of y - axis is ............

• y = 0

• x = 0

• x = 1

• x + y = 0

if the straight line passes through the origin point then its form will be ...........

• a x + b y = 0

• x = 0

• y = 0

• y = m x + c

the slope of any vertical line is .........

• 0

• 1

• undefined

• half