What is the 1997th no. in the sequence of 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,7......?

Answer 1

1+2+3+4+5+6+7... if you keep going (and I am sure there is an easier way) the number is 110.

Basically, I knew that if you added 1+2+3....100=1050.

If you keep going beyond that,

109=1995, so the numbers went 109, 109 times, and then 110, 110 (which are numbers 1996, and 1997!)