# How to get 30 by adding three number from 1,3,5,7,9,11,13,15

2
by mahi31

2016-03-27T21:55:14+05:30
It's impossible to take 3 odd numbers and get an even sum.
odd + odd + odd
= (odd + odd) + odd
= even + odd
= odd

However, there is a trick to doing this:
6 + 11 + 13 = 30

The trick is you flip the 9 upside down which makes it 6

2016-03-27T21:55:50+05:30
Hey there!
We have been learning since primary that the sum of any odd numbers taken odd times is never even.
Eg : 1 +7+3+5+7 = 23
Is 23 even ? Nope! Its not.
Similarly, sum of any odd numbers taken at odd times cannot be even, its always odd.You can't change a maths rule alright, you can't say 1+1 = 5.Is it ? No, its not

And yeah,for general knowledge, this is one question that has been forwarded in the social media to fool people and yes people are befooled.They are misunderstanding primary maths.
So, better you don't get fooled because I believe you know maths :)

But, if you really want to know maths.
There is a method
3! + 11 + 13
= (3×2×1) + 11 + 13
= 6 + 11 + 13
= 30

That's called factorial and you will learn it in higher classes. :)
Please don't mark my answer as brainliest even if it deserves because some people are pleading for that. Their life is on its edge if they don't get it.