Excerpt from The Intellectual Multiplier: Comprising Concise and Easy Methods of Multiplying Numbers Mentally; Designed for the Use of Pupils in Public and Private Schools

The "Intellectual Multiplier" is designed to furnish pleasing and useful mental exercises for pupils in public and private schools.

A very little practice will enable pupils to answer all the questions in each article promptly, also to solve all similar questions rapidly and correctly, which will be of great practical use in a variety of calculations.

The contractions, in multiplying by numbers larger than 129, are useful, and furnish interesting exercises for mental training. The correctness of these contractions may be verified by multiplying in the usual manner.

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