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Byju's Answer
Standard VI
Mathematics
Prime Factors
If 216= 2 a...
Question
If
216
=
2
a
3
b
, then find the value of
a
+
b
.
A
3
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B
4
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C
5
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D
6
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Solution
The correct option is
C
6
216
=
2
a
3
b
...(1)
And,
216
=
6
3
...(2)
∴
2
a
3
b
=
6
3
....From (1) and (2)
2
a
×
3
b
=
2
3
×
3
3
So,
a
=
3
,
b
=
3
∴
a
+
b
=
3
+
3
=
6
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