Reliance Jio Equation Quiz 1

5x +2  = 127 

5x = 127 - 2 

5x = 125

x = 25

2^{x}\times 3^{y} = 36

We Factor 36 as  2^{2}\times 3^{2}

After comparing x = 2 , y = 2

a+b = 3+2 = 5

(a+b)^{3} = 5^{3} = 125

x + \frac{1}{x} = 2

Squaring both side

x^{2}+ \frac{1}{x^{2}} +2x\frac{1}{x} = 4

x^{2}+ \frac{1}{x^{2}} = 4 - 2

x^{2}+ \frac{1}{x^{2}} = 2

Price of unit gram for Packet A = {10}{100} = \frac{1}{10} = 0.1

Price of unit gram for Packet B = {6}{50} = 0.12

 

Packet A is cheaper

(a+b)+(b+c)+(c+a) = 3 + 4 + 5

=> 2a + 2b +2c = 12

a + b + c = 6

Let Raj has number of pen = x

Let Aman has number of pen = y

x+y = 30--------(1)

x = 2y -----------(2)

Put value of x = 2y in equation 1

2y + y = 30

3y = 30

y = 10

x = 30 -10 = 20

Raj has 20 pens

To find the X - intercept put y = 0

4x + 0 =12

x = 3

3x + 4 = 2(2x-1)

=> 3x +4 = 4x -2

=> 4x - 3x = 4 + 2

x = 6

Cost of 14 Pens and 12 pencil = 106

Cost of 7 Pens and 6 pencil = \frac{106}{2} = 53