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Byju's Answer
Other
Quantitative Aptitude
Sum of Consecutive Numbers (Not Starting from 1)
Add.i 613+213...
Question
Add.
(i)
6
1
3
+
2
1
3
(ii)
1
1
4
+
3
1
2
(iii)
5
1
5
+
2
1
7
(iv)
3
1
5
+
2
1
3
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Solution
(i)
6
1
3
+
2
1
3
=
6
×
3
+
1
3
+
2
×
3
+
1
3
=
18
+
1
3
+
6
+
1
3
=
19
3
+
7
3
=
19
+
7
3
=
26
3
=
24
+
2
3
=
24
3
+
2
3
=
8
+
2
3
=
8
2
3
(ii)
1
1
4
+
3
1
2
=
1
×
4
+
1
4
+
3
×
2
+
1
2
=
5
4
+
7
2
=
5
4
+
7
×
2
2
×
2
=
5
4
+
14
4
=
5
+
14
4
=
19
4
=
16
+
3
4
=
16
4
+
3
4
=
4
+
3
4
=
4
3
4
(iii)
5
1
5
+
2
1
7
=
5
×
5
+
1
5
+
2
×
7
+
1
7
=
26
5
+
15
7
=
26
×
7
5
×
7
+
15
×
5
7
×
5
=
182
35
+
75
35
=
182
+
75
35
=
257
35
=
245
+
12
35
=
245
35
+
12
35
=
7
+
12
35
=
7
12
35
(iv)
3
1
5
+
2
1
3
3
1
5
+
2
1
3
=
3
×
5
+
1
5
+
2
×
3
+
1
3
=
16
5
+
7
3
=
16
×
3
5
×
3
+
7
×
5
3
×
5
=
48
15
+
35
15
=
48
+
35
15
=
83
15
=
75
+
8
15
=
75
15
+
8
15
=
5
+
8
15
=
5
8
15
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