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4. 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!

Answers (1)

best_answer

Let the number be x.

According to the question the equation is :

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

or $7x\ +\ 90\ =\ 300$

or $7x\ =\ 300\ -\ 90\ =\ 210$

or $x\ =\ 30$

Hence the number is 30.

Posted by

Devendra Khairwa

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