Courses
Courses for Kids
Free study material
Offline Centres
More
Store Icon
Store
seo-qna
SearchIcon
banner

Find a number which has a multiple of all the numbers from 1 to 10?
A. 5040
B. 1260
C. 720
D. 1440

Answer
VerifiedVerified
504.6k+ views
1 likes
like imagedislike image
Hint:In the problem they have asked us to find the number which has a multiple of all the numbers from 1 to 10, we go for the least common multiple (LCM) of all the numbers from 1 to 10. Implies the least number which is a multiple of 1, 2, 3,…, 10. Either the obtained LCM or its multiple will be the choice we need.


Complete step-by-step answer:
Least common multiple (LCM) of numbers a, b is defined to be the least number which is a multiple of both a and b.
We need a number from the choices which has a multiple of all the numbers from 1 to 10 implying that the required answer should have the factors 1, 2, 3, …, 10. Thus let us check, which is the least common multiple (LCM) of all the numbers from 1 to 10. The LCM we require will be nothing but the value after multiplying all numbers from 1 to 10.
LCM (1, 2, 3, 4, …, 10) =2520
Either the above LCM will be the solution as its factors include all the numbers from 1 to 10, or its multiple from the choices.
As we have 5040=2520×2 we have 5040 as the multiple of 2520.
5040 is the number having multiple of all the numbers from 1 to 10.

So, the correct answer is “Option A”.

Note:LCM (1,2,3, …, 10)= the least number which is a multiple of all the numbers from 1 to 10. Number 7 is the one which is not a factor or multiple of any other numbers from 1 to 10. Thus choose 7. Now as we have 2 as a factor of 4,6 and 10, we eliminate the common factor 2. And 8=2×4, 9=3×3 and 10=2×5, we eliminate 8, 9, 10. Thus choose 3, 4, 5, 6, 7 which are the only numbers required to find the LCM from 1 to 10. Thus we obtain 3×4×5×6×7=2520.

Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
calendar iconAcademic year 2025-26
language iconENGLISH
book iconUnlimited access till final school exam
tick
School Full course for CBSE students
PhysicsPhysics
ChemistryChemistry
MathsMaths
₹41,848 per year
Select and buy
WhatsApp Banner