Familiarity with the Number Code given in the book on Memory, will
aid the child in keeping the result of a problem. The numbers of the
answer can quickly take the form of an object which can be translated
again into the correct numbers. Many children will not be able to hold
the visual picture of the digits for any length of time. There is
considerable difference in the ability to hold the visual picture of
the digit 127. Many children, and adults, will be far more accurate and
remember longer if they see a TANK, which is easily translated by the
Code into 127, when the answer is wanted.