Question

1 dot in 1st box , 2 dot in 2nd box, 3 dot in 3rd box, what is total box for 55 dots​

Answer 1

Answer:

1540

Step-by-step explanation:

1 + 2+ 3+....+55 = (55 x 56)/2 =1540

(as 1 + 2 + ..... + n = [n(n+1)]/2