This is a classic math problem, and it is not solved in a normal way.
<span>1+4=5
2+5=12
3+6=21
8+11=?
There is a pattern that can be spotted. 2+5 does not equal twelve, however 2*(2+5) does equal 12. Below is how to solve the rest of the equations:
</span>1+4=5 -> 1*(4+1)=5
2+5=12 -> 2*(5+1)=12
3+6=21 -> <span>3*(6+1)=21 </span>
8+11=? -> <span>8*(11+1)=96
</span>
This is one way to answer the problem, HOWEVER there is another way to answer the problem that gives the SAME answer, but many people mistakenly believes it gives a different answer. If anyone tries to post the other way of doing this problem, but tells you the answer is 40, please comment on this post or message me and let me know. I will explain why the answer is actually 96 either way.
The upside down U means the numbers the sets have in common.
Do what is in parenthesis first:
(B ∩ C) = 6 is the only common number in set B and Set C.
A ∩ (B ∩ C) = Would be all the numbers in A plus the number 6 from (B ∩ C).
The answer would be A) {1, 3, 5, 6, 7, 9}
I think the answer would be C but I am not certain.
The total number of possible combinations to make a three digit number is 60
<u>Explanation:</u>
Given:
Five numbers are there = 1, 2, 3, 4, 5
We have to form three digit number
The number should not be repeated
Consider 3 dashes for 3 digits : ___ ___ ___
The first dash can be occupied by any 5 digits.
The second dash can be occupied by 4 digits
The third dash can be occupied by 3 digits
Thus, number of possible combinations to make a three digit number is
= 5 X 4 X 3
= 60
Therefore, total number of possible combinations to make a three digit number is 60
