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UPSC 2015 CDS I Math Paper
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© examsnet.com
Question : 7
Total: 100
What is the remainder obtained when
1421
×
1423
×
1425
is divided by 12 ?
[2015 CDS-I]
1
2
3
4
Validate
Solution:
Remainder when 1421 is divided by 12 = 5
Remainder when 1423 is divided by 12 = 7
Remainder when 1425 is divided by12 = 9
∴ Remainder when
1421
×
1423
×
1425
is divided by 12
= Remainder when
5
×
7
×
9
=
315
is divided by 12
=3
© examsnet.com
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