4017/Mathematics

last SG · 2006-11-06T18:14:08+00:00

lol wad school ya from..i m from ngee ann sec btw

hisoka SG

i don't need to take gp or english exams anymore so i can mangle up my english Twisted Evil

jaydunkfull SG

math was ok la~~~ scarly paper one easy, paper two very difficult Neutral

Orange*Asterisk SG

the hardest the better.

Classyfied SG

wa lao..so easy...now A1 must be at least 90 lor...like psle not good..i hope p2 hard hard then more thrilling Mr. Green

gohby SG

They can give their "difficult" paper 2 for all i care. IN fact, I would prefer very difficult papers. Heh heh.. Twisted Evil

Classyfied SG

Mr. Green same..cuz if easy test no skills..only test u careless..hard test iq so those not so good one can be filtered out

jaydunkfull SG

today’s e math paper two is at 2.30pm right?

Orange*Asterisk SG

yeap.

xiaosotong SG

gd luck every one!
leaving for sch le..

jaydunkfull SG

how come the paper so long? during prelims mine was only 2h

Orange*Asterisk SG

full mark already! if never get a1, i chop off anything u say.

Orange*Asterisk SG

filter out them!!!! Evil or Very Mad

jaydunkfull SG

got the similarity and congruency question and teh number pattern question dont know how to do Evil or Very Mad

jaydunkfull SG

eh orange asterisk, how come you have access to a computer so quickly after the paper? you bring laptop to school or you chiong home after paper?

Orange*Asterisk SG

no. pattern: 5+10+15....500

simple solution: LET 5 be X
5+10+15...+500=x+2x+3x...+100x
T100=ans for iii x 5 Very Happy

Orange*Asterisk SG

NAME THE QUAD IN QN 4!

ME! TRAPEZIUM!!!!!!! Laughing

jaydunkfull SG

Originally posted by Orange*Asterisk:

no. pattern: 5+10+15....500

simple solution: [b]LET 5 be X
5+10+15...+500=x+2x+3x...+100x
T100=ans for iii x 5 Very Happy [/b]

hmmm why didnt i think of it?
and i also wrote trapezium for qns 4

Darkness_hacker99 SG

Originally posted by Orange*Asterisk:

no. pattern: 5+10+15....500

simple solution: [b]LET 5 be X
5+10+15...+500=x+2x+3x...+100x
T100=ans for iii x 5 Very Happy [/b]

I worte, multiplys of 5 : 500/5 = 100

Non-multiplys of 5: 500-100=400

Sum of non mitiply of 5: subt in 400 as n.

gohby SG

Can anyone beat me? Laughing

They say make use of 5050 right, and i cant see the link between 5050 and 5+10+.... WHATEVER CRAP.

so you know what i did?

Press calculator!!

then (luckily press quickly and accurately) 25250 (or something like that)

then i see how to derive 25250 from 5050

then i see its multiply by 5

So can anyone beat me? Laughing

lageihsif SG

u can also see it as ( 5 + 10 + 15 + ..... 500 )/5
which means its 5 * ( 1 + 2 + 3 + ..... 100 )

then for the non multiple of 5
just use the ( 1 + 2 + 3 + .... 499 + 500 ) - the mutiples of 5
faster

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