Practice CSEC 001

If 3n is an even number, which of the following is an odd number?

• 3n - 1

• 3n - 2

• 3n + 2

• 3n + 2n

If x = 4 and y = 2, what is the value of

 $\frac{x^2+3y}{xy}$  

•  $1\ \frac{3}{4}$  

•  $2\ \frac{1}{2}$  

•  $2\ \frac{3}{8}$  

•  $2\ \frac{3}{4}$  

The expression -2(x-4) is the same as

• -2x - 8

• -2x + 8

• -2x - 4

• -2x + 4

If m*n =

 $\sqrt{m^2\ -n^2}$  then 5*3 =

• 2

• 4

•  $\sqrt{8}$  

•  $\sqrt{34}$  

if 3(x - 1) - 2(x - 1) = 7, then the

value of (x - 1) is

• 6

• 7

• 8

• 9