Question

Can you solve this Halloween riddle? You’ve just been trick-or-treating and snagged a big bar of chocolate! The bar is eight pieces high and nine pieces long. Can you work out how many times you have to break the bar so that it is separated into individual squares?

Answer 1

the answer is 71, because you don't need to break last piece of chocolate.

Answer 2

The bar is 8 by 9
If you break it into 9 groups of 8, you break it 8 times
You have to break each of the 8 pieces on each of the 9 pieces 7 times
In total, you would break it 8×7 times, which is 56
You break the bar 56 times.