My Math Forum 10 year olds math assignment challenge!

 Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

 November 18th, 2018, 02:03 PM #11 Global Moderator   Joined: Dec 2006 Posts: 19,977 Thanks: 1851 27 = (-1 + 4)! * 9/2 31 = 1 * 4! + 9 - 2 45 = 1/.4 * 9 * 2 = 1^4 * 9/.2 57 = -1 * 4! + 9² 58 = 1 - 4! + 9² 69 = -1 + 4!*√9 - 2 70 = 1 * 4!*√9 - 2 79 = -1*√4 + 9² 80 = -(1^4) + 9² = (1 + 4! - 9)/.2 83 = 1 * √4 + 9²
November 18th, 2018, 02:04 PM   #12
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Quote:
 Originally Posted by Denis Sure is! I'll start:
I don't think you're going to get to 100!

 November 18th, 2018, 04:06 PM #13 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,612 Thanks: 954 Skip, you missed 68; no charge: -1 + 4! + 9/.2 = 68
November 18th, 2018, 04:19 PM   #14
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Quote:
 Originally Posted by Maschke I don't think you're going to get to 100!
Just got "to 100" : 1*T(4) + T(9)*2 = 1*10 + 45*2 = 100

T = Triangular number...

November 18th, 2018, 05:11 PM   #15
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Quote:
 Originally Posted by Denis Just got "to 100" : 1*T(4) + T(9)*2 = 1*10 + 45*2 = 100 T = Triangular number...
I can't believe I repeated my lame joke twice without effect. OP said: "construct all numbers from 1 to 100!"

 November 18th, 2018, 05:38 PM #16 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,612 Thanks: 954 ...so you meant "100!" ; but that's only a 158 digits number
November 19th, 2018, 12:25 AM   #17
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100 = (1 + 49)*2

Quote:
 Originally Posted by Spritofmaths 49=(-1+(squrt4)^(9))^2 59=-1+4*(squrt9) divided by 2
There are slips in those.
49 = 1 * (√49)²
59 = -1 + 4√9 / .2 = 14 + 9 / .2

 November 19th, 2018, 01:07 PM #18 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,612 Thanks: 954 The 90's! 1 * √4 * 9 / .2 = 90 1 + √4 * 9 / .2 = 91 1 + T(4) +9^2 = 92 1 + √4 * T(9) + 2 = 93 1 + √4 * T(9) + T(2) = 94 -1 - 4! + (√9 + 2)! = 95 -1 * 4! + (√9 + 2)! = 96 1 - 4! + (√9 + 2)! = 97 -1dozen + 4 + 9dozen - 2 = 98 -1 + T(4) + T(9) * 2 = 99
 November 19th, 2018, 03:22 PM #19 Newbie   Joined: Nov 2018 From: Mississauga Posts: 5 Thanks: 0 Thank you guys! But you missed one other number........ 55.. if you could find anything, that would be nice. There is also another way to make 98 Denis, which does not require dozen.... 1*49*2 and 94: 1* squrt4+92 Last edited by Spritofmaths; November 19th, 2018 at 03:25 PM. Reason: I forgot something
November 19th, 2018, 04:39 PM   #20
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Quote:
 Originally Posted by Spritofmaths Thank you guys! But you missed one other number........ 55.. if you could find anything, that would be nice. There is also another way to make 98 Denis, which does not require dozen.... 1*49*2 and 94: 1* squrt4+92
Shoot! I thought 14, 49, 92, 149 and 492 could not be used...

T(-1+4+9-2) = 55

Last edited by skipjack; November 19th, 2018 at 07:17 PM.

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