Use the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, once each and in their natural order to obtain an answer of 100. You may use only the operations....+, -, *, /.

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kjcdb8er's profile pic

kjcdb8er | Teacher | (Level 1) Associate Educator

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Solve the following situation: ((((((((1 ? 2) ? 3) ? 4) ? 5) ? 6) ? 7) ? 8) ? 9) = 100

The answer to this puzzle is ((1 × 2) + 3) × 4 × 5 + 6 - 7 - 8 + 9 = 100

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neela | High School Teacher | (Level 3) Valedictorian

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1+2+3+4+5+6+7+8*9 =100.

Sum from 1 to 7 = 28.

9*8=72

 

Amanda_fernando's profile pic

Amanda_fernando | Student, Grade 9 | eNotes Newbie

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1+2+3+4+5+6+7=28
8 x 9=72

So... 1+2+3+4+5+6+7+8 x 9 =100

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