find the HCF of 10, 20 and 30
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Answer:
10
Step-by-step explanation:
because when we hcf by first 10 and 20 it is 10 and when we hcf by 10 and 30 is also 10.
Step-by-step explanation:
FIRST METHOD-----------
Factor of 30 =1,2,3,5,6,10,15,30
Factor of 20 = 1,2,4,5,10,20
Factor of 10 = 1,2,5,10
--------------------------------------...
common factor =1,2,5,10
Highest Common Factor = 10
H.C.F =10 ANS.
SECOND METHOD-
PRIME FACTOR OF 30=2,3,5
PRIME FACTOR OF 20 =2,2,5
PRIME FACTOR OF 10 =2,5
--------------------------------------...
COMMON PRIME FACTOR=2,5
H.C.F. =2*5 =10 ANS.
THIRD METHOD --------
10)20(2
---20
----------
X
10)30(3
---30
---------------
X
H.C.F =10 ANS.
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