As Dudeney shows in the illustration here, it is easy to use four 5s to create a sum that equals 100. He then points out that four 9s would also be fairly easy to do, in the form of 99 + 9/9. Achieving it with just four 7s is somewhat trickier. Can you manage it?
1 Comment
onwu adole shedrach
I Will be happy if I will be get help in this study like this thanks ,
March 11, 2017