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Q: The first 6 triangular numbers are?

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The first six triangular numbers are : 1,3,6,10,15,21. However, sometimes the first triangular number is regarded as 0 (zero) so you then have 0,1,3,6,10,15 as the first six triangular numbers.

Triangle numbers or triangular numbers are those numbers that can form an equilateral triangle when counting the objects. The first five triangular numbers are: 1, 3, 6, 10, 15.

1, 3 and 6

no No it is not. The first 5 triangular numbers are: 1, 3, 6, 10, 15

The first six triangular numbers are 1, 3, 6, 10, 15 and 21.

The first two triangle numbers are 3 and 6. [Unless you start with 1 as the first.]

The first twelve triangular numbers are: 1 3 6 10 15 21 28 36 45 55 66 78

No. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...

1, 3, 6, 10, 15

1+3+6+10 =20

1, 3, 6, 10, 15, 21

6 and 10 are triangular numbers that make 16.

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