Question

Sum of first 20 odd numbers is



210

420

400

410

​

Answer 1

Answer:

410

Step-by-step explanation:

please make it brainliest answerand follow me

Answer 2

Sum of first 20 natural numbers?

Just add 1+3+5+7+9....

Wait! That's time consuming.

Is there a short cut method to do the same thing?

Yes it is!

Just use this formula

Sum of first n natural number is always n²

So, Sum of first 20 natural number will be given by: 20² = 20×20 = 400

And hence 400 is correct answer.

Hope it helps,

And

Don't forget to follow me and choose this answer as the brainliest one.