siimplyrosie05
siimplyrosie05 siimplyrosie05
  • 21-08-2020
  • Mathematics
contestada

I need help arranging cards in a 4 x 4 grid with numbers 1-9 so that the sum of each row and each column is 20. This what the grid looks like:

Respuesta :

Ace248 Ace248
  • 21-08-2020

Answer:

8, 2, 8, 2

7, 3, 7, 3

6, 4 6, 4

9, 1, 9, 1

Step-by-step explanation:

In the picture, it shows two of each number so I'm gonna base it off the picture but let me know if I should base it off the wording.

So we know that half of 20 is 10. This will be valuable information. So we need the sum of two numbers to equal 10. So for the rows we can just do 8+2+8+2, 7+3+7+3, 6+4+6+4, 9+1+9+1.

Since there are 18 numbers, I'm assuming we don't have to use all of them.

Answer Link
bralon21 bralon21
  • 03-09-2020
It’ll always be 8 and 8
Answer Link

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