Mukesh has x dollars more than the amount Mohan has and together they have a total of y dollars. Which of the following represents the number of dollars that Mohan has?
In a trapezium sum of a pair of opposite angles (A and B) is 180 degree. If one other angle (C) is half the remaining angle (D). Then difference of C and D is
If fathers age is thrice his sons age and mothers age is 5 less than her husbands age then the difference between mothers and sons age will be. The age of son is x.
On increasing the length of any square by 2 unit and decreasing the breadth by 2 unit, the new area will be
OPtion
1) 12 unit more
2) 12 unit less
3) 8 unit more
4) 8 unit less
5) 4 unit more
6) 4 unit less
7) 2 unit more
8) 2 unit less
9) no change
10) none of these
Solution
let the side is x so area = x^2
area of rectangle = (x+2)(x-2)
so difference = 4 unit (less)
It does not matter what the value of x is
if x + 1/x = 4
then how many integers are there between the roots of this equation.
OPtion
1) 0
2) 1
3) 2
4) 3
5) 4
6) 5
7) 6
8) 7
9) no real roots so nothing can be said
10) none of these
Solution
on solving roots are .268 and 3.732
so answer = 3
second method
on putting x=0 value of expression = 1
x=1 = -2
x=3 = -2
x=4 = 1
so 1, 2 and 3 are possible answers
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NAREN
"The gaming of numbers is called maths.So participate in this wonderful game and explore in it,learn in it and enjoy in it.Then only you can pass in this wonderful game."