Hi everybody, {nl} Who's up for a challenge? I chose these numbers at random. {nl} PUZZLE 1 {nl} 10,50,5,25,and 500. {nl} {nl} Use these numbers to make the number 575. {nl} {nl} Rules: {nl} Use only these numbers {nl} No number can be used twice {nl} You do not have to use all the numbers {nl} You can use + - x or divide. {nl} You can use brackets. {nl} {nl} First one to respond with exact answer wins. If you post later but you have a substantially different answer, you win too. {nl} If no-one gets the exact answer then closest answer after 24 hours wins. (competition closes in 48 hours) {nl} {nl} You will be expected to explain how you got your answer. {nl} {nl} Use a name other than 'guest' and your wins will be recorded. {nl} If enough people are interested we will keep playing with different numbers. {nl} Any questions? {nl} (I have copied this game from the previous number puzzles.) {nl} Have fun.

knownhappyman68 Aug 23, 2017

#3**+1 **

10, 50, 5, 25 and 500 to make 575

One way :

500 - 25 + (10/5) * 50 =

475 + 2 * (50) =

475 + 100 =

575

CPhill Aug 23, 2017

#4**+1 **

** PUZZLE 1 10,50,5,25,and 500. Use these numbers to make the number 575.**

\(\begin{array}{rcll} 575 &=& 500-50-(10-5)\times 25 \\\\ 575 &=& 500-25+50+5\times 10 \\\\ 575 &=& 500-(10-50+25)\times 5 \\\\ 575 &=& 500-25+\frac{10\times 50}{5} \\\\ 575 &=& \frac{5\times 25\times 50-500}{10} \\ \end{array}\)

\(\begin{array}{rcll} 575 &=& (5\times 10)+25+500 \\\\ 575 &=& (5\times 25)-50+500 \\\\ 575 &=& 25+(50+5)\times 10 \\\\ 575 &=& (25-10)\times 5+500 \\ \end{array} \)

\(\begin{array}{rcll} 575 &=& 25+50+500 \\ \end{array}\)

heureka Aug 24, 2017

#5**0 **

You all did very well... But...Gh0sty15 You must you all numbers... I am sorry but you were not able to compete in this challenge... CPhill and heureka you all have very good answer Good job

knownhappyman68 Aug 28, 2017

#6**+1 **

I don't understand why Gh0sty was unable to complete the challenge. What you said is contradictory to your original post.

I have highlighted, in red, where Gh0sty thought it was unnecessary to use every number:

Hi everybody, {nl} Who's up for a challenge? I chose these numbers at random. {nl} PUZZLE 1 {nl} 10,50,5,25,and 500. {nl} {nl} Use these numbers to make the number 575. {nl} {nl} Rules: {nl} Use only these numbers {nl} No number can be used twice {nl} You do not have to use all the numbers {nl} You can use + - x or divide. {nl} You can use brackets. {nl} {nl} First one to respond with exact answer wins. If you post later but you have a substantially different answer, you win too. {nl} If no-one gets the exact answer then closest answer after 24 hours wins. (competition closes in 48 hours) {nl} {nl} You will be expected to explain how you got your answer. {nl} {nl} Use a name other than 'guest' and your wins will be recorded. {nl} If enough people are interested we will keep playing with different numbers. {nl} Any questions? {nl} (I have copied this game from the previous number puzzles.) {nl} Have fun.

TheXSquaredFactor
Aug 28, 2017

#7**0 **

TheXSquaredFactor... I Forgot all about that... I am so sorry for the misunderstanding... I take back what I said... I'm sorry

knownhappyman68
Aug 29, 2017