The sum of the digits of a two digit number is 9. The number obtained by reversing the digits is 9 less than the original number. find the number. â€‹

Assume two digit number is ab.

ATQ

a + b = 9 ...(i)

10 a + b - 10 b - a = 9

9a - 9b =9

a - b = 1...(ii)

Equation (i) + Equation (ii)

a + b + a -b = 9+1

2a = 10  => a =5

b = 4

Hence the original number is 54.

Preparation Products

JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Rank Booster NEET 2021

This course will help student to be better prepared and study in the right direction for NEET..

₹ 13999/- ₹ 9999/-
Knockout JEE Main April 2021 (Easy Installments)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 14999/-
Knockout NEET May 2022

An exhaustive E-learning program for the complete preparation of NEET..

₹ 34999/- ₹ 24999/-