To Ascertain a Number Thought of 49
How to Name a Number which has been Erased 51
A Lesson in the Correct Formation of a Figure 52
Four Nines Problem 53
An Answer to a Sum Given in Advance 53
An Arithmetical Puzzle 54
An Arithmetical Mystery 55
How to Tell Her Age 55
A Race in Addition 56
To Predict the Hour Your Friend Intends to Rise on the
Following Morning 57