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Byju's Answer
Standard VIII
Mathematics
Finding Square Root of a Number
Find the smal...
Question
Find the smallest number by which 7776 is to be multiplied to get a perfect square.
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Solution
Given, a number as
7776
. We need to find out a number which if divided by the given number we should get a perfect square.
Step:
1
Resolve
7776
into prime factors
7776
=
2
×
2
×
2
×
2
×
2
×
3
×
3
×
3
×
3
×
3
Step:
2
By pairing the factors obtained
⇒
7776
=
(
2
×
2
)
×
(
2
×
2
)
×
(
3
×
3
)
×
(
3
×
3
)
×
2
×
3
Step:
3
Dividng the number woth the factor which are alone.
Here,
2
,
3
are in pairs and
3
,
2
are alone.
⇒
3
×
2
=
6
⇒
7776
6
=
1296
Hence,
6
is the smallest number which is to be multiplied to the given number to get perfect square.
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Find the smallest whole number by which
180
should be multiplied, so as to get a perfect square number.
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