Flag Magical Mathematics[Interesting Approach]> Amina thinks of a number and subtracts 5/...
question mark

Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?

Debasmita Pingua , 3 Years ago
Grade 8
anser 1 Answers
Vedant Borkar

Last Activity: 3 Years ago

Let us take the number as thought by Amina to be 'x'.
 
First she subtracts 5/2 from it :
     x-(5/2)
Then she multiplies it by 8:
    8.{x-(5/2)}
Finally the result is three times the original number:
    8.{x-(5/2)}=3x
    8x - 20=3x
    5x=20
   -------> X=4.   

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments