Question

what is the sum of 20 natural numbers?

Answer 1

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20 =210
I hope it will help you

Answer 2

Hey friend,

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Question: What is the sum of 20 natural numbers?

Answer:

AP = 1,2,3,4,5,...........,20.

First term (a) = 1

Common difference (d) = 1

Number of terms (n) = 20

$Sn = \frac{n}{2} [2a + (n-1)d]$

$=> S_{20} = \frac{20}{2} [2*1 + (20-1)*1]$

$=> S_20 = 10[2 + 19]$

$=> S_{20} = 10 \times 21$

$=> S_{20} = 210$

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Hope this helped you !!