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How do I find the sum of 1 to 20?

The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210


What is the sum of the odd numbers between 20 and 26?

The odd numbers between 20 and 26 are 21, 23, and 25. To find the sum, add these numbers together: 21 + 23 + 25 = 69. Therefore, the sum of the odd numbers between 20 and 26 is 69.


What Three consecutive integers have the sum of 60?

19, 20, and 21


What are the two consecutive integers that's sum is 41?

20 and 21


Sum of 3 consecutive numbers is 60?

19, 20, 21


What two consecutive numbers have a sum of 41?

They are: 20+21 = 41


The sum of two numbers is 21 The difference of the two numbers is19 What are the two numbers?

20 and 1. 20 + 1 = 21 20 - 1 = 19


How do you get the sum of two-thirds and two-sevenths?

2/3 + 2/7 = 14/21 + 6/21 = 20/21


3 consecutive integers for whose sum is -63?

-22, -21, -20


What are the two consecutive numbers whose sum is 41?

The numbers are 20 and 21.


What is the sum of the numbers 21 to100?

Without just going and doing the addition, you can use this formula:Sum of 1 to N is: (N+1)*N/2. So take sum of [1 to 100], then subtract off the sum of [1 to 20], and you'll have left the sum [21 to 100].Sum [1-100] = (100+1)*100/2 = 5050. Sum[1-20] = (20+1)*20/2 = 210.So 5050 - 210 = 4840


What is the sum of three consecutive page numbers is 60?

60/3 = 20 so 19, 20 and 21.