Question

13, 30, x, 148, 273 . Find x = ?

Answer 1

Answer:

13×2+4=30

30×2+4=64

Step-by-step explanation:

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Answer 2

Answer:

The value of x=75.        

Step-by-step explanation:

Given : Series 13, 30, x, 148, 273.

To find : The value of x?

Solution :

Series 13, 30, x, 148, 273.

The difference between the terms is

2nd - 1st- 30-13=17

3rd-2nd- x-30

4th-3rd- 148-x

Let y be the common addition factor,

So, The two equation form is

$17 + y = x - 30$ 

$x-y=47$ .... (1)

$x-30 + y = 148 - x$

$2x+y=178$.... (2)

Solving (1) and (2) by adding them,

$x-y+2x+y=47+178$

$3x=225$

$x=\frac{225}{3}$

$x=75$

Therefore, The value of x=75.