Ask a Doubt
Request a call back

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

ICSE Class 10 Answered

A twodigits number contains the smaller of the two digits in the unit place . The product of the digits is 40 and the difference between the digits is 3. Find the number.
Asked by maitripatel9069.10sdatl | 16 Apr, 2020, 10:52: AM
Expert Answer
Let a be the smaller of the two digits, so it must be at the unit's place and b be the digit at ten's place.
The number is 10b + a.
According to the first condition,
a cross times b equals 40 space... space left parenthesis i right parenthesis A c c o r d i n g space t o space t h e space s e c o n d space c o n d i t i o n comma b minus a equals 3 rightwards double arrow b equals 3 plus a space space... space left parenthesis i i right parenthesis S u b s t i t u t i n g space b space f r o m space left parenthesis i i right parenthesis space i n space left parenthesis i right parenthesis comma space w e space g e t a open parentheses 3 plus a close parentheses equals 40 rightwards double arrow a squared plus 3 a minus 40 equals 0 rightwards double arrow a squared plus 8 a minus 5 a minus 40 equals 0 rightwards double arrow a left parenthesis a plus 8 right parenthesis minus 5 left parenthesis a plus 8 right parenthesis equals 0 rightwards double arrow left parenthesis a plus 8 right parenthesis left parenthesis a minus 5 right parenthesis equals 0 rightwards double arrow a equals negative 8 space space o r space space a equals 5 a space c a n apostrophe t space b e space n e g a t i v e rightwards double arrow a equals 5 rightwards double arrow b equals 8 H e n c e comma space t h e space r e q u i r e d space n u m b e r space i s space 85.
Answered by Renu Varma | 17 Apr, 2020, 10:51: AM

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
ICSE 10 - Maths
Two squares have sides x cm and (x+5)cm .The sum of their areas is 697 sq.cm.-thanks (i)Express this as an algebraic equation in x. (ii)Solve this equation to find the sides of the squares.
Asked by rashikulkarni28 | 21 Jul, 2022, 08:36: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Two trains leave a railway station at the same time .The first train travels due west and the second train due north. The first train travels 5km/hr faster than the second train. If after 2 hours, they are 50 km apart, find the speed of each train.
Asked by yashi24jan | 04 Dec, 2021, 09:42: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
There is a rectangular onion storehouse in the farm of Mr.Ratnakarrao at tivasa. The length of rectangular base is more than its breadth by 21m and diagonal is more than length by 6m. Find length and breadth of a storehouse.
Asked by siddghode4371 | 22 Sep, 2021, 11:08: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
If x=2 and x=3 are the roots of the equation 3x2-2kx+2m=0. then what is the value of m. 
Asked by mishraurmila597 | 17 Aug, 2020, 08:16: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
A man brought some books fir ruppees 1200when the price of each rose by rupees 30 he could buy 2 books less for ruooees 1200find the original prucr of the book
Asked by bhumikav668 | 22 Jul, 2020, 03:51: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
are two digit number contains smaller of the two digits in the units place. the product of the the digits is 40 and the difference is 3 find the number
Asked by suneelmsc | 02 May, 2020, 02:05: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
A twodigits number contains the smaller of the two digits in the unit place . The product of the digits is 40 and the difference between the digits is 3. Find the number.
Asked by maitripatel9069.10sdatl | 16 Apr, 2020, 10:52: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
A woman is six times as old as her son. Two years ago, the product of their ages was 84. Find their present ages.
Asked by khushdab | 02 Apr, 2020, 04:15: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
The numerator of a fraction is 2 less than its denominator. If 3 is added to each of the numerator and the denominator, the fraction increases by 1/18. Find the fraction.
Asked by khushdab | 01 Apr, 2020, 11:21: AM
ANSWERED BY EXPERT
ICSE 10 - Maths
.
Asked by Kanwaranita10 | 03 Mar, 2020, 02:48: PM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt