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Other
Quantitative Aptitude
Divisibility Rule for Composite Numbers
What is the r...
Question
What is the remainder when
7
+
77
+
777
+
7777
+
…
(till 100 terms) is divided by 8?
A
2
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B
4
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C
6
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Solution
The correct option is
C
6
7
+
7
+
777
…
(
t
i
l
l
100
t
e
r
m
s
)
8
=
7
8
+
77
8
+
777
8
…
(
t
i
l
l
100
t
e
r
m
s
)
7
+
5
+
1
+
1
+
1
…
(
t
i
l
l
100
t
e
r
m
s
)
8
=
7
+
5
+
98
8
=
6
8
Hence, remainder = 6
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Similar questions
Q.
What is the remainder when
7
7
+
7
77
+
7
777
+
7
7777
.
.
.
.
.
.
.
.
.
+
7
77777777
is divided by 8?
Q.
What is the remainder when
(
1
)
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+
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)
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+
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Q.
Find the sum to n terms of the series
7 + 77 + 777 + 7777 + ...
Q.
Simplify the following
Q. 7777+777+77+7
Q.
N = 7777 ....... 7777, where the digit 7 repeats itself 603 times. What is the remainder left when N is divided by 1144?
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