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Strange Multiplication Cases

Activities

Consider the following case of multiplication of two numbers:

48 x l59 = 7,632.

It's remarkable in that each of the nine digits is involved once here. Can you think of any other examples? If so, how many of them are there?

Solution

12 x 483 = 5,796, 48 x 159 = 7,632,
42 x 138 = 5,796, 28 x l57 = 4,396,
18 x 297 = 5,346, 4 x 1738 = 6,952,
27 x 198 = 5,346, 4 x 1963 = 7,852.
39 x 186 = 7,254,

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Source: Numeracy Counts !, Anita Rampal, R Ramanujam and L S Saraswati, N L R C, LBS National Academy of Administration, Mussoorie.

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