Adding consecutive numbers starting from 1
Again we come back with the new trick of math. In this method
we will learn how to add consecutive numbers starting from 1 by a simple method.
Are you ready for it?
Say yes
I know that all you will do it by adding the starting number
to the last number
1 + 9 = 10
2 + 8 = 10
3 + 7 = 10
4 + 6 = 10
And 5
Total is 10 +10 +10 +10 +5 = 45
But if you asked for find the sum of all numbers from 1 to
100 than you can’t do it so easily. Don’t vary I will tell you how to do it
with easily
Rule: - Multiply the amount of numbers in the group by one
more than their number and divide by 2
For example you are asked to find the sum of all number from
1 to 99. There are 99 integers in this series, one more than this series is 100
Thus
99*100 = 9900
Divide it by 2
9900/2 = 4950 answer
The sum of all numbers from 1 to 99 is therefore 4950.
Keep visiting for the
new spicy tricks
Comments
Post a Comment