Using the digits, 1,2,3,4,and 5, how many even three digit numbers less than 500 can be formed if each number can be used more than once!

The number of such numbers is 4×5×2= 40

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

I’m pretty sure the answer is a