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Number Theory Level 3

What is 123456789 × 999999999 123456789\times999999999


The answer is 123456788876543211.

Mardokay Mosazghi by Mardokay Mosazghi , 22, USA

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3 solutions

123456789 (1000000000-1) =123456789 1000000000-123456789 =123456788876543211

1 Helpful 0 Interesting 0 Brilliant 0 Confused

same solution @anik Mandal posted

Mardokay Mosazghi - 6 years, 11 months ago
Anik Mandal
Jul 16, 2014

The most simple question-

123456789*(1000000000-1)

=123456789*1000000000-123456789

=123456788876543211

1 Helpful 0 Interesting 0 Brilliant 0 Confused

@anik mandal ha ha yes quite a simple one but i think many people are trying to use calculators for this and they are mistyping their numbers, attempts is growing rapidly.

Mardokay Mosazghi - 6 years, 11 months ago

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GOSH!! Never thought multiplication of natural numbers could get to lvl#3...

Satvik Golechha - 6 years, 11 months ago

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yeah @Satvik Golechha level 3 wha??

Mardokay Mosazghi - 6 years, 11 months ago

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@Mardokay Mosazghi – Yes really astonishing!

Anik Mandal - 6 years, 11 months ago
Kevin Patel
Jul 18, 2014

123456788876543211.....it's calculation...easy

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