The value of $\sqrt{91+\sqrt{70+\sqrt{121}}}$ is

• 10

• 11

• 12

• 9

The numerical expression $\frac{3}{7}+\frac{\left(-7\right)}{8}=\frac{25}{56}$ shows that

• rational numbers are closed under subtraction
  
  

• rational numbers are closed under multiplication
  
  

• rational numbers are closed under division
  
  

• rational numbers are closed under addition

23.

A coin is tossed 10 times and the outcomes are observed as
H, T, H, T, T, H, H, T, H, H
(H is Head; T is Tail)
What is the probability of getting Head?

• $\frac{4}{5}$

• $\frac{2}{5}$

• $\frac{1}{5}$

• $\frac{3}{5}$

A geometric representation, showing the relationship between a whole and its part, is

• pie chart
  
  

• pictograph
  
  

• bar graph
  
  

• histogram

Which one of the following 3D shapes does not have a vertex?

• Prism
  
  

• Cone
  
  

• Sphere
  
  

• Pyramid

Let a, b, c be three rational numbers, where a=$\frac{3}{5}$, b= $\frac{2}{3}$ and c =$\frac{-5}{6}$, which one of the following is true?

• $a÷\left(b+c\right)=b÷\left(a+c\right)$

• $a+\left(b+c\right) =c +(a+b)$

• $a-\left(b-c\right)=c-(a-b)$

• $a\times \left(b+c\right)=b\times \left(a+c\right)$

In a park, 784 plants are arranged, so that number of plants in a row is same as the number of rows. The number of plants in each row is

• 28
  
  

• 38
  
  

• 48
  
  

• 18

Given below is a data set of temperatures (in ^oC)
-6,-8,-2,3, 2, 0,5, 4, 8.

What is the range of the data?

• 16 ^oC

• 18 ^oC

• 10 ^oC

• 0 ^oC

If q is the square of a natural number p, then p is

• the square root of q
  
  

• equal to q
  
  

• greater than q
  
  

• the square of q

If ${\left(\frac{5}{7}\right)}^4\times {\left(\frac{5}{7}\right)}^{-3}={\left(\frac{5}{7}\right)}^{5x-2}$ ,then x is equal to

• $\frac{2}{5}$

• $\frac{3}{5}$

• $\frac{4}{5}$

• $\frac{1}{5}$