Math, asked by RokibulIslam, 10 months ago

1. Observe the following pattern for obtaining the sums.
and find the sum of numbers from 781 to
1+2+3+4+5+6+7+8+9+ 10 = 55
11+12+13 + ...... + 19 + 20 = 155
21 + 22 + 23 + ..... + 29 + 30 = 255
51 +52 +53 + ..... + 59 + 60 = 555
790.

Answers

Answered by rohtashbhati85359

0

Answer:

7584

Step-by-step explanation:

I hope the answer is 7584

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