Geometry and Algebra ( Grade 9 )

The scientific notation of  $\frac{3\times\left(0.6\right)^2}{900}is$  

•  $1.2\times10^{-5}$  

•  $1.2\times10^{-4}$  

•  $1.2\times10^{-6}$  

 $if\ m\ =5-3\left(\frac{1}{2}\ -\ 1\right)^2\ then:$  

• m= $\frac{1}{2}$  

• m= $\frac{7}{2}$  

• m= $\frac{17}{4}$  

^{The price of an article was 60000 LL.}

^{After reduction it becomes 49 800 LL. }

^{The percentage of reduction is:}

• 27%

• 17%

• 7%

If the price of an object increased by 10% followed by a reduction of 10% , then its price :

• increased

• decreased

• Not changed

ABC is a triangle and x > 4 . If

 $AB^2=\left(x\ -\sqrt{12}\right)\left(x\ +\ \sqrt{12}\right),$  
AC = x  and BC =  $2\sqrt{3}$  , then ABC  is triangle...

• Right at A 

• Right at C

• Right at B 

ABC  is a right angled triangle at A and M is midpoint of [BC]. 
If AM = AB= $\sqrt{6}$  , then AC =.. 

• 18

•  $2\sqrt{3}$  

•  $3\sqrt{2}$  

15% of balls is 18, then the total number of balls is:

• 120

• 130

• 150

The solution of

 $\frac{2x\ -\ 1}{3}-\frac{3x}{2}\le-3\ is:$ 

• x = $\frac{16}{5}$  

• x  $\ge\frac{16}{5}$  

• x $\le\frac{16}{5}$  

 $If\ \frac{1}{1+\sqrt{2}}\ =\ a+b\sqrt{2},\ then$  

the value of a + b=

• 0

• 2

• -2

A( -3 , 6 ); B( 5, 2 ) and E( 1 , m ) are collinear points then

m = ….

• -4

• 2

• 4