Let's first turn all the words into numbers:
Two and four tenths = 2.4
One and six tenths = 1.6
Four and one tenth = 4.1
Now lets represent "a number" as x.
Then translate the wording into a linear equation:

Simplify and isolate the variable:

Divide by 0.8
x>1.375 or x>1 3/8
Answer:
17
Step-by-step explanation:
both m's substitute for 4
4+4+9
8+9
17
B: 100,000 combinations because if you have 5 digits, your equation is 10^5 which equals 100,000,