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 Subsquares (Posted on 2008-05-21)
The numbers from 1 to 100 are arranged, snaking back and forth from the bottom, in a 10x10 grid:

```100 99 98 97 96 95 94 93 92 91

81 82 83 84 85 86 87 88 89 90

80 79 78 77 76 75 74 73 72 71

61 62 63 64 65 66 67 68 69 70

60 59 58 57 56 55 54 53 52 51
+--------------+
|41 42 43 44 45|46 47 48 49 50
|              |
|40 39 38 37 36|35 34 33 32 31
|              |
|21 22 23 24 25|26 27 28 29 30
|              |
|20 19 18 17 16|15 14 13 12 11
+--+           |
| 1| 2  3  4  5| 6  7  8  9 10
+--+-----------+
```

Marked off are two subsquares that, if you add up the numbers within them, the total is the square of one of the numbers within. The larger square (5x5) totals 625, the square of 25, which is found within that marked square. The other one shown is the trivial "1", a 1x1 square, the single number in which of course is its own square.

Find another subsquare where the sum of its contained numbers is equal to the square of one of those numbers.

 See The Solution Submitted by Charlie Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 re: Who's on First? | Comment 5 of 9 |
(In reply to Who's on First? by ed bottemiller)

There is a review process. Click on the site FAQs on the right side panel, and when there click on the user ranks. You'll find Journeymen and Scholars look over and vote on the problems that are awaiting publication on the site.

There is an out-of-date mention there of two problems being posted each weekday.  When the number of problems awaiting publication got low, we decided to publish only 1 puzzle in a given day regardless of day of the week.

 Posted by Charlie on 2008-05-21 12:30:15

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