Q. 64.0( 6 Votes )
Raju wrote a number having 2 digit where the digit in the ten’s position is thrice the digit in the unit position and the new number obtained by reversing the positions of the digits is 36 less than the initial number. Let’s find the number writer by Raju.
Let the digit in the unit’s place be x
Then given the digit in the ten’s place is thrice the digit in the unit position = 3x
So the 2 digit number is 10(3x)+x………(i)
By reversing the position of the digits we get the new number as
Now according to the given criteria,
36 less than the initial number = 10(3x)+x-36=31x-36…..(iii)
So from question equation (ii) and equation (iii) are equal,
From equation (i), the 2 digit number is
Hence the 2 digit number written by Raju is 62
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Let’s find the roots of the equations (i.e. let’s solve the equations).
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Salem uncle of our village used of this savings to buy a house after his retirement from a government job. One day after falling in trouble, he sold his house and got 5% more than his cost price. If he would have taken Rs. 3450 rupees more then he would get 8% more than his cost price. Let’s find the amount of money Salem uncle used to buy his house, and his entire savings.West Bengal - Mathematics