Question

If 4 is the first triangular number, which is the tenth one?​

Answer 1

Answer: 88 will be the tenth number

Answer 2

Given  : 4 is the first triangular number,

To Find :  tenth one

Solution:

1st  Number    = 4

2nd number  =  4 + 5  = 9

3rd number  =  4 + 5  + 6  = 15

and so on

10th Number   =  4 + 5 + 6  + 7 + 8 + 9 + 10 + 11 + 12 + 13  

= 85

85 is  tenth one

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⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕

  ⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕

    ⊕⊕⊕⊕⊕⊕⊕⊕⊕⊕

      ⊕⊕⊕⊕⊕⊕⊕⊕⊕

        ⊕⊕⊕⊕⊕⊕⊕⊕

          ⊕⊕⊕⊕⊕⊕⊕

            ⊕⊕⊕⊕⊕⊕

              ⊕⊕⊕⊕⊕

                ⊕⊕⊕⊕

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