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Question
Find the square of the following number:
405
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Solution
Here n = 40
\[\therefore\] n(n + 1) = (40)(41) = 1640
\[\therefore\] 4052 = 164025
RELATED QUESTIONS
Write a Pythagorean triplet whose one member is 6.
Write a Pythagorean triplet whose one member is 14.
Observe the following pattern \[1 = \frac{1}{2}\left\{ 1 \times \left( 1 + 1 \right) \right\}\]
\[ 1 + 2 = \frac{1}{2}\left\{ 2 \times \left( 2 + 1 \right) \right\}\]
\[ 1 + 2 + 3 = \frac{1}{2}\left\{ 3 \times \left( 3 + 1 \right) \right\}\]
\[1 + 2 + 3 + 4 = \frac{1}{2}\left\{ 4 \times \left( 4 + 1 \right) \right\}\]
and find the values of following:
1 + 2 + 3 + 4 + 5 + ... + 50
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