Question

TRUE O FALSE
{K,C,R,A}={K,C,A,R}
{E,H,A,N}={A,H,E,N}
{3,7,12,14}={3,7,12,14,0}
{E,R,S,H}=[S,RH,E}

Answer 1

For two sets to be equal, then
1. the number of elements in the first set has to be equal to that of the second set.
Can you spot one case above where this is not true?
2. Each element of one set has to equal to the same element of the other. If there is ONE element that we cannot find in the other set, then the sets are not equal.
Example:
In {K,C,R,A}={K,C,A,R}
K=K, C=C, R=R, A=A
So every element correspond, thus the statement is true.

If you are not sure about the other two, post your answer for verification.