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Byju's Answer
Standard X
Mathematics
Representing Equations on a Graph
The sum of th...
Question
The sum of the first 5 triangular numbers is equal to:
A
16
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B
25
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C
35
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D
50
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Similar questions
Q.
Find the sum of the first three triangular numbers and check whether the sum is a triangular number or not.
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Find the sum of first three odd triangular numbers.
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The nth triangular number is defined to be the sum of the first
n
positive integers. For example, the
4
t
h
triangular number is
1
+
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+
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+
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=
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. In the first
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,
3
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,
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of triangular numbers, how many are divisible by
7
?
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