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CBSE Class 8 Answered

Which of the following numbers are triangular numbers? (i) 3 (ii) 8 (iii) 10 (iv) 12
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer
The dot pattern of the numbers 3 and 10 can be expressed as a triangle, as shown below:



So, the numbers 3 and 10 are triangular numbers.

The numbers 8 and 10 cannot be expressed as triangles, so they are non-triangular numbers.
Answered by | 04 Jun, 2014, 03:23: PM

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