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52-card lottery (Posted on 2023-03-29) Difficulty: 3 of 5

Let a 52 deck of numbered cards be created as follows:

2 special cards: 0 and 1
25 powers of 2: 2, 4, 8, ..., 2^25
25 powers of 3: 3, 9, 27, ..., 3^25

Shuffle the deck and draw at random 3 cards. Evaluate the product of the 3 numbers, say P.

What is the probability of P=0?
What is the probability of P being a non zero integer square?
What is the probability of P being a 4-digit number?

No Solution Yet Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Part 2 (analytical corrected) | Comment 7 of 11 |
(In reply to Part 2 (analytical corrected) by Steve Herman)

One can't always rule out 1 as the even power of the lone power of one of the two bases, but only if that was the one chosen for one of  the base represented twice.


Oddly 5/17 comes out higher than the exhaustive searches of possible hands. I don't know what else is happening.

  Posted by Charlie on 2023-03-29 10:11:25
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