Question: if @ is a binary operation defined as the difference between an integer n and the product of n and 5 , then what is the largest positive integer n such that the outcome of the binary operation of n is less than 18 ?
A) 1
B) 2
C) 3
D) 4
E) 5
Correct answer: D
Grade: 7 | Topic: Expressions and Equations | Difficulty: Hard | Standard: 7.EE.B.4a