11.

In a religious gathering, the ratio of the number of ladies to that of gents was 3:2. When 20 more gents joined, the ratio was reversed. The number of ladies was

• 36
  
  

• 40
  
  

• 16
  
  

• 24

For three non-zero real numbers a, b, c if $\frac{\mathrm{a}}{2}$=$\frac{\mathrm{b}}{3}$=$\frac{\mathrm{c}}{4}$=$\frac{2\mathrm{a}-3\mathrm{b}+5\mathrm{c}}{\mathrm{k}}$

• 10
  
  

• 15
  
  

• 20
  
  

• 25

If A and B be any two sets such that A/B= A, then A$\cap$B is

• $\mathrm{\varphi }$

• A

• B

• A$\cup$B

If the roots of the equation x²-bx+c=0 are two consecutive integers, then b²- 4c is

• 1
  
  

• -1
  
  

• 0
  
  

• 2

The HCF and LCM of two numbers are 13 and 1989 respectively. If one of the numbers is 117, then the other number is

• 222
  
  

• 221
  
  

• 223
  
  

• 225

Jatin buys an article for 10% less than its value and sells it for 10% more than its value. His gain is

• 20 %
  
  

• $22\frac{7}{9}$%
  
  

• $22\frac{2}{9}$%
  
  

• None of these

If the roots, of the equation ax²-px + 54= 0 are in the ratio 2:3, then the value of p is

• 18
  
  

• 21
  
  

• -21
  
  

• 15

The ratio of the heights of two right circular cones is 25:64 and the ratio of their diameters is 4: 5. The ratio of their volumes is

• 1:3
  
  

• 1:4
  
  

• 5:8
  
  

• 1:2

If A = {x :x is a letter in word BELOW}, B = {x: x is a letter in word WOOL} and C=A - B, then the number of subsets of C is

• 1
  
  

• 2
  
  

• 3
  
  

• 4

The perimeter of a rhombus whose diagonals are 10 cm and 24 cm is
 

• 120 cm
  
  

• 34 cm
  
  

• 68 cm
  
  

• 52 cm