Carcass wrote:
The integer a is even and the integer b is odd. For each of the following integers, indicate whether the integer is even or odd.
Attachment:
#GREpracticequestion The integer a is even and the integer b is odd..png
(a) even, (b) odd, (c) even, (d) even, (e) odd, (f) odd
Math Review
Question: 14
Page: 220
Difficulty: medium
Some important rules:
#1. ODD +/- ODD = EVEN
#2. ODD +/- EVEN = ODD
#3. EVEN +/- EVEN = EVEN
#4. (ODD)(ODD) = ODD
#5. (ODD)(EVEN) = EVEN
#6. (EVEN)(EVEN) = EVENGIVEN: a is EVEN, and b is ODD.(a) a + 2b = EVEN + 2(ODD) = EVEN + EVEN = EVEN
(b) 2a + b = 2(EVEN) + ODD = EVEN + ODD = ODD
(c) ab = (EVEN)(ODD) = EVEN
(d) a^b = (EVEN)^ODD = (EVEN)(EVEN)(EVEN)(EVEN).... (b times) = EVEN
(e) (a + b)² = (EVEN + ODD)² = (ODD)² = (ODD)(ODD) = ODD
(f) a² - b² = EVEN² - ODD² = (EVEN)(EVEN) - (ODD)(ODD) = EVEN - ODD = ODD
Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.comSign up for GRE Question of the Day emails