find lcm and hcf 21,28,35
Answers
Answer:
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Step-by-step explanation:
LCM(21,28,35)
Least Common Multiple is :
420
Calculate Least Common Multiple for :
21, 28 and 35
Factorize of the above numbers :
21 = 3 • 7
28 = 22 • 7
35 = 5 • 7
Build a prime factors table
Number of times each prime factor
appears in the factorization of :
Prime
Factor Number
21 Number
28 Number
35 L.C.M
(max)
2 0 2 0 2
3 1 0 0 1
5 0 0 1 1
7 1 1 1 1
LCM = 22 • 3 • 5 • 7
Least Common Multiple is :
420
Answer:
L.C.M and H.C.F of 21 ,28 and 35
Step-by-step explanation:
21=7*3
28=7*2*2
35=7*5
7 is common in every number ...
Hence h.c.f of 21,28and35 is 7
l.c.m = 7*3*2*2*5
=> 420 Ans ....
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