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Form 21 n Times (Posted on 2016-03-11) Difficulty: 2 of 5
The array below represents a set of 16 playing cards, with the A's representing Aces:

A 3 5 8 10 2 4 9 4 2 7 A 2 5 3 8

Divide the array into sections of adjacent cards so that the sum of the cards' values in each section will be 21. Each Ace can represent either 1 or 11 and you must determine how many sections are needed.


From Page-a-Day Calendar 2016: Amazing Mind Benders, by Puzzability (Mike Shenk, Amy Goldstein and Robert Leighton), Workman Publishing, NY; puzzle for March 9.

See The Solution Submitted by Charlie    
Rating: 4.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolution spoilerJer2016-03-11 11:02:42
No SubjectAdy TZIDON2016-03-11 09:19:53
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