Solve the following riddle:
I am a number,
Tell my identity!
Take me seven times over
And add a fifty!
To reach a triple century
You still need forty!

AcademicMathematicsNCERTClass 7

To do:  

We have to solve the given riddle.

Solution:

Let the required number be $x$

$7\times x + 50 = 300 - 40$

$7x+50= 260$

$7x = 260 - 50$

$7x= 210$

$x = \frac{210}{7}$

$x= 30$

So, the required number is 30.

raja
Updated on 10-Oct-2022 13:33:38

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