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JEE Main 8 Apr 2024 Shift 1 Solved Paper
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© examsnet.com
Question : 25
Total: 90
Let the positive integers be written in the form :
If the
k
th
row contains exactly
k
numbers for every natural number
k
, then the row in which the number 5310 will be, is _______.
[8 Apr 2024 Shift 1]
Your Answer:
Validate
Solution:
👈: Video Solution
S
=
1
+
2
+
4
+
7
+
.
.
.
.
.
.
+
T
n
S
=
1
+
2
+
4
+
.
.
.
.
.
.
Tn
=
1
+
1
+
2
+
3
+
.
.
.
.
.
.
+
(
T
n
−
T
n
−
1
)
T
n
=
1
+
(
n
−
1
2
)
[
2
+
(
n
−
2
)
×
1
]
T
n
=
1
+
1
+
n
(
n
−
1
)
2
n
=
100
T
n
=
1
+
100
×
99
2
=
4950
+
1
n
=
101
T
n
=
1
+
101
×
100
2
=
5050
+
1
=
5051
n
=
102
T
n
=
1
+
102
×
101
2
=
5151
+
1
=
5152
n
=
103
T
n
=
1
+
103
×
102
2
=
5254
n
=
104
T
n
=
1
+
104
×
103
2
=
5357
© examsnet.com
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