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How to tan mathematics in job examination by Khairul Islam

# Quick solutions can not be in the wrong , The precise amount will not be a waste of time .  # See the proof :  1. # Four fifth of a number is 10 more than two third of the number.

The number is ( ie a number of four- pancamansa number two – thirds of the 10 , how many ?) (Janata Bank Officer- 2009)  a.55 b.65 c.75 d.80

# Simple solution :

Let's figure x,

# Prasnamate ,



4x / 5 - 2x / 3 = 10
Or , 12x - 10x / 15 = 10
Or , 2x / 15 = 10
Or , 2x = 150

So therefore the number x = 150/2 = 75 = 75 Answer: 75


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