- #1

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What's the missing number and why?

http://img18.imageshack.us/img18/2408/a89raetsel.png [Broken]

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- Thread starter Equate
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- #1

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http://img18.imageshack.us/img18/2408/a89raetsel.png [Broken]

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- #2

drizzle

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- #3

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why?5[and this just to submit the post, damn 4 characters! :grumpy:]

- #4

drizzle

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- #5

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I thought that too, but you beat me to it. You don't think there might be a pattern in the columns?

- #6

drizzle

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24 22 **22 **28

hold on a sec!

hold on a sec!

- #7

drizzle

Gold Member

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2

3

4

so

- #8

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- #9

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Each row and column has two numbers that have 4 letters, hence the missing number must have 4 letters. Each row has an odd number of odd values, and each column has an even number of odd values. Hence, the missing number must be odd. The only choices being 5 or 9. Looking at the rows, no number is more than 3 away from its neighbors, hence, the number cannot be 9, and must be 5.

DaveE

- #10

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Look at the total for each column and each row.

Column 1: 24

Column 2: 23

Column 3: ?

Column 4: 27

Row 1: 21

Row 2: 23

Row 3: ?

Row 4: 27

If you use 4, that means the 3rd row is 24 and the 3rd column is 21. Therefore there is a 1:1 ratio of the frequency of column sums to row sums.

..right?

- #11

drizzle

Gold Member

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check it :)

Look at the total for each column and each row.

Column 1: 24

Column 2: 23

Column 3: ?

Column 4: 27

Row 1: 21

Row 2: 23

Row 3: ?

Row 4: 27

If you use 4, that means the 3rd row is 24 and the 3rd column is 21. Therefore there is a 1:1 ratio of the frequency of column sums to row sums.

..right?

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