smc

Question

A 4 4 block of calendar dates is shown. First, the order of the numbers in the second and the fourth rows are reversed. Then, the numbers on each diagonal are added. What will be the positive difference between the two diagonal sums? array[t]|c|c|c|c| 4c 1&2&3&4 8&9&10&11 15&16&17&18 22&23&24&25 array

Accepted Answer

After reversing the numbers on the second and fourth rows, the block will look like this: array[t]|c|c|c|c| 4c 1&2&3&4 11&10&9&8 15&16&17&18 25&24&23&22 array The positive difference between the two diagonal sums is then (4+9+16+25)-(1+10+17+22)=3-1-1+3=4.