Quiz for 8,9 and 10

If A={a,b,c} and B= {b,c,d,e}, then A-B = .............

• {b,c}

• {a,b,c}

• {a}

• {d,e}

If AUB={a,b,c,d,f,r,t}, then n(AUB) =..............

• 2

• 7

• 0

• {a,b}

Which of the following is the formula of discount percentage?

• $\frac{discount}{SP}\times100\%$

• $\frac{discount}{MP}\times100\%$

• $\frac{discount}{CP}\times100\%$

• None of them

What is the area of equilateral triangle?

• $\frac{\sqrt{3}}{4}a^2$

• $\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$

• $\frac{1}{2}\times b\times h$

• $l\times b$

The formula of mean in continuous series is ............

• $\frac{\Sigma x}{n}$

• $\frac{\Sigma fm}{N}$

• $\frac{\left(Sum\ of\ data\right)}{No.\ of\ data}$

• $\frac{\left(N+1\right)}{2}th\ term$

Right angle refers to ..........

• 90∘

• 180∘

• 45∘

• none of them

 $What\ is\ the\ value\ of\ \left(3y\right)^0\ \ ?$  

• 3

• 1

• 0

• 4

Which of the following statement is not true?

• The sum of interior angle of a triangle is 180.

• Opposite sides of parallelogram are equal.

• All sides of rectangle are equal.

• Square has 4 sides.

2³.2⁵.2 ^{- 6} = ..........

• 4

• 2

• 6

• 8

For what power of x , equals to

 $\frac{1}{x^2}$  ?

• 2

• -2

• -1

• 1