11.

Two numbers are in the ratio 3:4. The product of their HCF and LCM is 2028. Then sum of the number will be

• 72
  
  

• 86
  
  

• 68
  
  

• 91

If a*b=(a X b)+ b,then 5*7 is equal to

• 35
  
  

• 42
  
  

• 12
  
  

• 59

An article is sold at 20% profit. If its cost price is increased by $₹$50 and at the same time if its selling price is also increased by 30, the percentage of profit decreased by $3\frac{1}{3}$%,then the cost price is

• $₹$851
   

• $₹$852
  
  

• $₹$850
  
  

• $₹$853

The minimum value of (x-2)(x-9)

• $\frac{49}{4}$

• 0

• $\frac{11}{4}$

• $-\frac{49}{4}$

If $\frac{a}{3}=\frac{b}{2}=\frac{c}{1}$, then$\frac{a+b+2c}{b}$

• 3.8

• 4

• 3.5

• 5

Find the value of K for which equation x - Ky =2, 3x + 2y = -5 , has unique solution.

• K$\ne \frac{-2}{3}$

• K=$\frac{2}{3}$

• K $\ne \frac{2}{3}$

• K=$\frac{-2}{3}$

A can do a work in 6 days. B takes 8 days to complete it. C takes as long as A and B would take working together. How long will it take B and C to complete the work together?

• $1\frac{1}{2}$days

• 4 days

• 5 days

• $2\frac{2}{5}$ days 

If $a^{m^n}= {\left(a^m\right)}^n$, then the value of m is

• $\frac{1}{n-1}$

• $n^n$

• $n-1$

• $n^{\frac{1}{n-1}}$

The value of  $\left(1-\frac{1}{5}\right)\left(1-\frac{1}{6}\right)\left(1-\frac{1}{7}\right)....\left(1-\frac{1}{100}\right)$ is 

• $\frac{1}{25}$

• $\frac{1}{50}$

• $0$

• $\frac{1}{100}$

In what time will the simple interest be $\frac{2}{5}$of the principal at 8 % per annum?

• 7yr
  
  

• 5yr
  
  

• 8yr
  
  

• 6yr