Question 355735
Pick an odd number.


Any odd number.


To double it up means to multiply it by 2 or add it to itself.


I will use 3.


Add: 3 + 3 = 6, an even number.


Multiply by 2: 3 x 2 = 6, same even number.


Try another number.


How about 5?


Add: 5 + 5 = 10, an even number.


Multiply by 2: 5 x 2 = 10, same even number.


In conclusion, when we DOUBLE an odd number we get an even number.