To solve the problem, we first list the numbers in the 4x4 grid and calculate their total sum.

Step 1: List the numbers

The grid is:
Row 1: 5, 3, 7, 5
Row 2: 6, 2, 8, 4
Row 3: 3, 1, 5, 3
Row 4: 4, 2, 6, 4

Step 2: Calculate the total sum

Add all numbers together:
[5+3+7+5 + 6+2+8+4 + 3+1+5+3 + 4+2+6+4 = 68]

Answer: 68

作者声明:本文包含人工智能生成内容。