Excessive sun is not good for your health
Number 3 is divisor of 12 and 15
There are even numbers and prime numbers
Negacion
Bi Conditional
Inclusive Disjunction
Conditional
If a number ends in 0 or 5, then this number is multiple of 5
You must study or you won`t pass the exam
The equality 2x+7=25 and only if x=9
Exclusive Disjunction
Conjunction
