Set A consists of all multiples of 5 greater than 10 and less than 100.
A = {15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95}
Set B consists all multiples of 8 greater than 16 and less than 100.
B = {24,32,40,48,56,64,72,80,88,96}
Show that each conjecture is false by finding a counter-example
a any number in set A is also in set B
That's false because 15 is in A but not in B
b any number less than 100 is either in set A or in set B
That's false because 99 is neither in set A nor in set B.
c no number is in both set A and set B
That's false because 40 (and also 80) is in both sets.
Edwin
