Drills Are UsMath brain teasers require computations to solve.
Mr. Od-1 had to purchase some drill bits by phone from his supplier, but neither he nor the supplier could remember if they came in packs of 10, 12 or 6. Mr. Od-1 hated the thought of getting opened packs if the supplier guessed wrong.
What is the minimum number of drill bits Mr. Od-1 could buy to ensure he got full packs regardless of whether there were 6, 10 or 12 drill bits per pack?
60 can be divided evenly by 6, 10 and 12. If there are 6 per pack he gets 10 packs, if 10 per pack he gets 6 packs and if 12 per pack he gets 5 packs.
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