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Byju's Answer
Standard VI
Mathematics
Estimating Product for Large Numbers
If 24, 92 =...
Question
If
(
24
,
92
)
=
24
m
+
92
n
, then
(
m
,
n
)
is
A
(
−
1
,
4
)
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B
(
4
,
−
1
)
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C
(
4
,
−
3
)
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D
(
−
4
,
3
)
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Solution
The correct option is
A
(
4
,
−
1
)
(
24
,
92
)
denotes the H.CF. of
24
and
92
, which is 4
The multiple of
24
nearest to
92
is
96
Thus,
24
×
4
−
92
×
1
=
4
and hence
m
equals
4
, while
n
equals
−
1
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0
Similar questions
Q.
If n is a natural number, then 9
2n
− 4
2n
is always divisible by
(a) 5
(b) 13
(c) both 5 and 13
(d) None of these
[Hint : 9
2n
− 4
2n
is of the form a
2n
− b
2n
which is divisible by both a − b and a + b. So, 9
2n
− 4
2n
is divisible by both 9 − 4 = 5 and 9 + 4 = 13.]