Parity-Sorted Anchor Heuristic
GMAT glossary · Playbook
Definition
Even pool =2,4,6, odd pool =1,3,5 on a standard die.
Parity-Sorted Anchor Heuristic in plain English
Pull Parity-Sorted Anchor Heuristic when dice or integers split cleanly into even and odd pools before counting. Clues include Even pool, odd pool, dice parity. Blueprint: Even pool =2,4,6, odd pool =1,3,5 on a standard die. List combinations in descending order inside each pool, then combine. Why it beats the long way: Mixed parity lists create clerical duplicates and misses. Micro-example: Two dice, sum even: both odd or both even. Odd pool 1,3,5, even pool 2,4,6. Descending anchors inside each pool (6-4, 6-2, 5-3, ldots) then shuffle, so you never rediscover 4-6 after counting 6-4.
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