[GMAT math practice question]
If n is a positive integer, is 3^n+3^8 divisible by 4?
1) n is a multiple of 3.
2) 3^2 +3^n+2 is divisible by 4.
=>
Forget conventional ways of solving math questions. In DS, VA (Variable Approach) method is the easiest and quickest way to find the answer without actually solving the problem. Remember that equal number of variables and independent equations ensures a solution.
The first step of VA(Variable Approach) method is modifying the original condition
...
If n is a positive integer, is 3^n+3^8 divisible by 4?
1) n is a multiple of 3.
2) 3^2 +3^n+2 is divisible by 4.
=>
Forget conventional ways of solving math questions. In DS, VA (Variable Approach) method is the easiest and quickest way to find the answer without actually solving the problem. Remember that equal number of variables and independent equations ensures a solution.
The first step of VA(Variable Approach) method is modifying the original condition
...
