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2/10 Number matrix

Which number should replace the question mark?

For each row, the third column involved calculating the sum of the digits.

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1000
What is ten divided by two?

Comments (9)

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Katariinasays...

I answered zero, because if you subtract the two digits that are in the same box, you'll get:

8, 5, 1

-2, 1, -1

4, ? , -6

Then if you add the rows you get: 13 (8+5+1), -2 and -6. I you add them up, it becomes zero, so the whole thing to keep the answer as zero, the ? should be zero. Possible solution, but wrong here.

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Aaronsays...

First row: 8,5,21= 21 (2+1)=3. 8-3=5

Second row 35,32,12= 12 (1+2)=3. 35-3=32

Third row 32,29,21= 21(2+1)=3. 32-3=29

Fourth row 4,?,28=28 (2+8)=10. 4-10=-6 (the answer)

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Khaledsays...

i only guessed it right and do not no why -6 is the answer

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massays...

For each row subtract the second column from the first column. The result is equal to the sum of the digits in the last column.

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Correct answersays...

This is the simple explanation

8-5=3 21/3=7

35-32=3 12/3=4

32-29=8 21/3=7

4+6=10 7+7+3+10=28

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