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Quantitative Aptitude

Sum of Consecutive Numbers

What is the d...

Question

What is the difference between the fourth triangular number and second triangular number?

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Solution

First triangular number = 1
Second triangular number = 3
Third triangular number = 6
Fourth triangular number = 10
Fifth triangular number = 15

The difference between fourth trianglular number and second triangular number = 10 - 3 = 7

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