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Manipal Entrance Test 2018 Math Paper
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© examsnet.com
Question : 27
Total: 70
The least positive remainder when
123
×
125
×
127
is divided by 124 is
4
120
121
130
Validate
Solution:
Since,
123
=
−
1
(
mod
124
)
125
=
1
(
mod
124
)
127
=
3
(
mod
124
)
Therefore,
123
×
125
×
127
=
(
−
1
)
(
1
)
(
3
)
mod
(
124
)
=
−
3
mod
(
124
)
=
121
mod
(
124
)
© examsnet.com
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