Odd and Even

GRE Math: Logic & Integers (Level 3) 1. If \(n = p \times q \times r\), where \(p, q,\) and \(r\) are distinct prime numbers, how many distinct positive factors does \(n^2\) have? 6 8 9 12 27 Check Solution (E): The number \(n\) is \(p^1 q^1 r^1\). Therefore, \(n^2 = (p^1 q^1 r^1)^2 =…

GRE Math: Logic & Integers (Level 2) 1. If \(a+b\) is even and \(b+c\) is odd, which of the following must be true? a is even b is odd c is even a+c is odd abc is even Check Solution (D): \(a+b\) is even \(\implies\) \(a, b\) have the same parity (both even or both…

GRE Math: Logic & Integer Properties 1. If \(x\) and \(y\) are integers and \(3x + 4y\) is odd, which of the following must be true? x is odd y is odd x is even y is even x and y are both odd Check Solution (A): Since \(y\) is an integer, \(4y\) must be…