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You can use the formula for the sum of an arithmetic series to calculate that quickly. (Of course, you can also type the numbers into Excel, and get the sum - but that doesn't scale well - e.g., it won't work well if you are then asked, for instance, to get the sum of the first million even numbers.)
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What are three even consecutive numbers whose sum is 120?
The numbers are 38, 40 and 42.
What is sum of first 40 numbers?
The sum of the first 40 whole numbers is 780.
Find the sum of first 20 even numbers. sum?
The sum of the first 20 even numbers... is 110
What is the sum of the first 20 even numbers?
2+4+6+8+10........+40=420
What two numbers have the sum of 40 and the difference of 10?
The numbers are 25 and 15
What is the sum of the first 40 evn numbers?
The sum of the first 40 even numbers is 1,640.
What are three even consecutive numbers whose sum is 120?
The numbers are 38, 40 and 42.
What is sum of first 40 numbers?
The sum of the first 40 whole numbers is 780.
What is the sum of the first 40 odd numbers?
The sum of the first 40 odd numbers is 1,600.
Find the sum of first 20 even numbers. sum?
The sum of the first 20 even numbers... is 110
What is the sum of the first 20 even numbers?
2+4+6+8+10........+40=420
What is the answer when you add all numbers from 40 to 60?
The sum of the numbers 1 to 39 = 39 x 40 ÷ 2 = 780 The sum of the numbers 1 to 60 = 60 x 61 ÷ 2 = 1830 Therefore the sum of the numbers 40 to 60 = 1830 - 780 = 1050
What is the sum of the prime numbers between 40 and 60?
The prime numbers between 40 and 60 are 41, 43, 47, 53 and 59. These sum to 243.
What is the average of 7 2 9 22?
Sum of numbers = 40 Count of numbers = 4 Average = Sum/Count = 40/4 = 10
What is the sum of the first 40 even positive integers?
The sum of the first 40 even positive integers can be equal to 820.
The sum of three consecutive numbers is 123 what are the numbers?
The numbers are 40, 41 and 42.
What is the sum of two numbers between 20 and 40 that is 58 and will equal 12 if subtracted?
The sum of two numbers between 20-40 is 58. The difference is 12
