DAY 63

Comment

7 x 8 is 7 x 71/2 plus 7 x 1/2.
71/2 x 71/2 is 7 x 71/2 plus ... .

Answer

B is 1/4 more than A.

Readers' methods

F Boyer, Leeds:
The diagram shows that 7 x 8 = 71/2 x 71/2 - 1/4.

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