15 replies to this topic

[gisellebebegirl]

okay;; so today in ap chemistry class, our teacher put a puzzle on the board and we all spent an hour trying to figure it out, and no one was actually able to complete it;;.. lets see how smart you are.. heres the puzzle:

3344556677=153

make the following equation make sence by adding the following signs: + + - -
(note the symbols are in in betwen the numbers;

The closests i got to the answer was 154;; urgg..

[xpress]

Hi gisellebebegirl! Here is the answer for your puzzle 3-344+5+566-77=153

[Saint_Michael]

Well I know no one will become a chemist in that class , but I would think though that this be more appropriate in a math class and not a chemistry class, but xpress math is correct on this solution.

[galexcd]

Nice googling skills xpress. Interesting puzzle, more along the lines of guess and check than actual math.... Also fairly easy to make, here's one that I just made up so google searching the answer won't work on this one:

2071965266=1508

EDIT: sorry about not being clear on the rules... Same rules as the topic starter.

Edited by galexcd, 23 November 2008 - 06:56 AM.

[Nabb]

What are the rules? My javascript (I was doing a little javascript hacking (bookmarklets OWN) earlier so might as well use it) didn't churn out anything that worked. I took rules of the original post..

for(poc=1;poc<13;poc++){
for(ptc=poc+1;ptc<14;ptc++){
for(moc=0;moc<13;moc++){
if((moc!=poc)&&(moc!=ptc)){
for(mtc=moc+1;mtc<14;mtc++){
if((mtc!=poc)&&(mtc!=ptc)){
st="20719652661508"
if(mtc>ptc){
st=st.substring(0,mtc)+'-'+st.substring(mtc)
if(moc>ptc){
st=st.substring(0,moc)+'-'+st.substring(moc)
st=st.substring(0,ptc)+'+'+st.substring(ptc)
st=st.substring(0,poc)+'+'+st.substring(poc)
}else{
st=st.substring(0,ptc)+'+'+st.substring(ptc)
if(moc>poc){
st=st.substring(0,moc)+'-'+st.substring(moc)
st=st.substring(0,poc)+'+'+st.substring(poc)
}else{
st=st.substring(0,poc)+'+'+st.substring(poc)
st=st.substring(0,moc)+'-'+st.substring(moc)
}}}else{
st=st.substring(0,ptc)+'+'+st.substring(ptc)
if(mtc>poc){
st=st.substring(0,mtc)+'-'+st.substring(mtc)
if(moc>poc){
st=st.substring(0,moc)+'-'+st.substring(moc)
st=st.substring(0,poc)+'+'+st.substring(poc)
}else{
st=st.substring(0,poc)+'+'+st.substring(poc)
st=st.substring(0,moc)+'-'+st.substring(moc)
}}else{
st=st.substring(0,poc)+'+'+st.substring(poc)
st=st.substring(0,mtc)+'-'+st.substring(mtc)
st=st.substring(0,moc)+'-'+st.substring(moc)
}}
st=st.replace('66','66==');
st=st.replace('6+6','6+6==');
st=st.replace('6-6','6-6==');
//document.write(st+" = "+eval(st)+"<br>")
//eval(st) never equals 1508 :(
if(eval(st)){document.write(st+"<br>")}
}}}}}}

edit) and yes I know hardcoding things like this is bad D:.. I just typed 'first minus' and stuff and did a bunch of replace alls at the end

Edited by Nabb, 22 November 2008 - 09:43 AM.

[xpress]

galexcd, on Nov 22 2008, 07:23 AM, said:

Nice googling skills xpress.

compliments? or criticism?

Quote

here's one that I just made up so google searching the answer won't work on this one:
2071965266=1508

OK. Here is the answer for your quesiton,

20*71-9+65+26+6=1508

Since you didn't mention any rules, I used multiplication and addition....
Hey why don't we start a new topic to improve and challenge our puzzle solving skills?

[anwiii]

it was neither. it was obious sarcasm also, your formula isn't just multiplication and addition. i was also under the assumption it would be the same rules as the previous post but for the life of me, i couldn't come up with the answer. seems it would be a simplier one than the original one since it's a larger # to =. i narrowed down a large percentage of the problem and i question the answer now under the same rules. nice job trying to figure out the current puzzle btw....even if multiplication isn't allowed, still a great effort!(that wasn't sarcasm btw )

xpress, on Nov 22 2008, 02:47 AM, said:

compliments? or criticism?
OK. Here is the answer for your quesiton,

20*71-9+65+26+6=1508

Since you didn't mention any rules, I used multiplication and addition....
Hey why don't we start a new topic to improve and challenge our puzzle solving skills?

[xpress]

anwiii, on Nov 22 2008, 02:30 PM, said:

it was neither. it was obious sarcasm also, your formula isn't just multiplication and addition. i was also under the assumption it would be the same rules as the previous post but for the life of me, i couldn't come up with the answer. seems it would be a simplier one than the original one since it's a larger # to =. i narrowed down a large percentage of the problem and i question the answer now under the same rules. nice job trying to figure out the current puzzle btw....even if multiplication isn't allowed, still a great effort!(that wasn't sarcasm btw )

Yeah..I know. By the way....I too tried with the orignal rules (2 +'s and 2 -'s) but didn't find exact solution. So, I went to multiplication and found this one. Anyway I will try it with original rules and post here if I find the solution.
Just waiting for galexcd to tell us the exact rules. And Thanks for your compliment....

[Nabb]

Damnit alex, don't be so sneaky!

(the answer is available in the previous piece of JS which I edited! Test it yourself ;p)

Edited by Nabb, 22 November 2008 - 09:46 AM.

[rpgsearcherz]

These would be more fun without programs that give you the answer,