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Haryana Police Constable Model Paper 5
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© examsnet.com
Question : 2
Total: 100
What will be the sum of even numbers between 0 and 51.
590
625
600
650
Validate
Solution:
Given
:
The numbers are even and lie between 0 and 51
Formula used
;
Numbers of terms in
AP
(
n
)
=
(
l
−
a
)
d
+
1
Sum of
AP
=
(
n
2
)
×
(
a
+
l
)
Here a is first term, l is last term, d is common difference
Calculation
:
The numbers are
2
,
4
,
6
,
.
.
.
.
.
50
Total even numbers are
[
(
50
−
2
)
2
+
1
]
=
25
Sum of terms =
(
25
2
)
×
(
2
+
50
)
=
25
×
26
⇒ Sum of terms =
650
∴
650 is the correct answer
.
© examsnet.com
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