Question

If 5 is equal to 11

And 7 is equal to 15
And 9 is equal to 19
What is 12 equal to ?????

Answer 1

25 is the answer because the numbers are in the relation of (×2+1). 5×2+1=11 7×2+1=15 9×2+1=19 12×2+1=25.

Answer 2

12 is equal to 25. this pattern is double the first number and add one.