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
If the roots of the equation x2-bx+c=0 are two consecutive integers, then b2- 4c is
1
-1
0
2
A.
1
Given, equation x2-bx+c=0
Let roots of the given equation and , then the sum of roots
==b
2 + 1=b
and product of roots,=c
Now according to the question:
b2-4c=(2+1)2-4(+1)
(4+1+4)-(4+4)=1
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 %
%
%
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