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• kelkoo (25)in #mathematics • 7 years ago

  RE: Brainsteem #9 Prize Maths Puzzle [Win 40% and 10% in SBD]

  so m+n= 137

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• kelkoo (25)in #mathematics • 7 years ago

  RE: Brainsteem #9 Prize Maths Puzzle [Win 40% and 10% in SBD]

  4 number from 1-9 sum up to 17: 1259 1268 1349 1358 1367 1457 2348 2357 2467 (9 combinations) or 4 number from 1-9 sum to 28: 9874 9865 (2 combinations) The probability= [11* (4!*5!)]/9! =11/126

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• kelkoo (25)in #mathematics • 7 years ago

  RE: Brainsteem Quickfire Q4 [Win 40% and 10% in SBD]

  It would be easier to start with cube, as there is only 5 3-digit cubes (i.e. 125,216,343,512,729). Note that 1 Across and 2 Down is cube. There is two possible solution pair:…

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• kelkoo (25)in #mathematics • 7 years ago

  RE: Brainsteem Quickfire Q3 [Win 2 SBD + 1 SBD]

  The smallest possible sum (a+b)= 36+45=81 1/20= 1/a+1/b= (a+b)/ab --> 20(a+b)=ab b=20a/(a-20)=20+400/(a-20) Hence a+b=a+20-400/(a-20), By differentiation, a+b is…

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• kelkoo (25)in #quiz • 8 years ago

  RE: QUIZ Test #11 - can you solve this? difficulty level: medium

  Yes, they will be free for sure! If number 1 see that 2 and 3's hat is of the same color, number 1 will guess his hat right. If number 1 cannot make a guess, number 2 should…

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• kelkoo (25)in #chainbb-general • 8 years ago

  RE: [Free Steem!] Mathematics × Programming Competition #1

  Answer submitted :)

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• kelkoo (25)in #contest • 8 years ago

  RE: $$$ Free Steem!!! Puzzle Contest #2 $$$

  I am participating.

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• kelkoo (25)in #math • 8 years ago

  RE: Math challenge #4 - Probability of slapping your Chief Executive?

  My answer is 0.07446 :)

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