Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 8 Answered

A number consists of two digits, of which the tens digit exceeds the ones digit by 3. The number itself is equal to seven times the sum of the digits. Find the number.
Asked by sujdps | 05 Aug, 2018, 07:53: PM
Expert Answer
begin mathsize 16px style Let space ten apostrophe straight s space digit space equals space straight x space and space unit apostrophe straight s space digit space equals space straight y then space the space two minus space digit space number space equals space 10 straight x space plus space straight y According space to space the space condition comma straight x space minus space 3 space equals space straight y rightwards double arrow straight x space minus space straight y space equals space 3 space.... left parenthesis straight i right parenthesis and space 10 straight x space plus space straight y space equals space 7 left parenthesis straight x space plus straight y right parenthesis rightwards double arrow 3 straight x space equals space 6 straight y rightwards double arrow straight x space minus space 2 straight y space equals space 0.... left parenthesis ii right parenthesis Subtracting space left parenthesis ii right parenthesis comma space from space left parenthesis straight i right parenthesis straight y space equals space 3 Substituting space straight y space equals space 3 comma space in space left parenthesis straight i right parenthesis straight x space equals space 6 and space the space two minus digit space number space is space 10 straight x space plus space straight y space equals space 10 space cross times space 6 space plus space 3 space equals space 63 end style
Answered by Yasmeen Khan | 06 Aug, 2018, 10:40: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
ICSE 8 - Maths
a number when divided by 6 is diminished by 40 find the number
Asked by akd011977 | 17 May, 2023, 07:51: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
what is radius
Asked by sharma.sunita88470 | 14 May, 2023, 04:54: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
Q4) WHAT IS THE LEAST NUMBER BY WHICH 135 MAY BE DIVIDED SO THAT THE QUOTIENT IS A PERFECT CUBE
Asked by swarup.ghosh21 | 10 May, 2023, 08:53: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
Q3) WHAT IS THE SMALLEST NUMBER BY WHICH THE NUMBER 256 BE MULTIPLIED TO OBTAIN A PERFECT CUBE?
Asked by swarup.ghosh21 | 10 May, 2023, 08:51: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
Q2) FIND THE SMALLEST NUMBER BY WHICH 3087 MAY BE MULTIPLIED SO THAT THE PRODUCT IS A PERFECT CUBE?
Asked by swarup.ghosh21 | 10 May, 2023, 08:49: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
Q1) FIND THE LEAST NUMBER BY WHICH 6750 MAY BE DIVIDED SO THAT THE QUOTIENT IS A PERFECT CUBE.
Asked by swarup.ghosh21 | 10 May, 2023, 08:47: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
FIND THE SQUARE ROOT OF THE FOLLOWING DECIMAL NUMBERS USING THE LONG DIVISION METHOD. i) 42.25
Asked by swarup.ghosh21 | 09 May, 2023, 08:49: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
madam what is mean by rational numbers
Asked by maraveniveni | 06 May, 2023, 12:50: PM
ANSWERED BY EXPERT
ICSE 8 - Maths
13. If a+b=9 and ab=-22,find i) a2-b2
Asked by swarup.ghosh21 | 01 May, 2023, 10:27: AM
ANSWERED BY EXPERT
ICSE 8 - Maths
Using identity (a+b)(a-b)=a2 - b2 , evaluate the following:- 34/5x46/5
Asked by swarup.ghosh21 | 01 May, 2023, 10:11: AM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt