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Reload this Page multiplication by all 9's
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Old 10th August 2006, 02:20 AM
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Thumbs up multiplication by all 9's
Multiplication by all 9's wherein multiplicant being of equal no. of digits as of multiplier. Solved eg below.

2148 * 9999 = 21477852 - This is solved just in fraction of seconds... How????

Reduce the number 2148 by 1 (2147) which is left part of answer. For next 4 digits write the complementary numbers from 9 in the same order of 2147 i.e 7852 ( i.e 9-2, 9-1, 9-4 & 9-7)
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Old 11th August 2006, 12:02 AM
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Thats great!!!

Looking forward for some more.
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