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i like such stuff if u solve it, post the next one

ok, maybe u are too high educated. here is the result (if u want): (Hidden Content) next one: well, this is simple.

(Hidden Content) pls post another one

this is one of my favourites. it looks simple, but the result is amazing u drive a complete lap with 60 km/h. how fast u have to drive the second lap (same distance) to get an average speed of 120 km/h?

@Apache, nice here is the comlete solution in formulars.1. velocity for 1 lap: v1 = s/t1 (where s is the length of the lap and t1 is the time needed for the first lap)2. average velocity for 2 laps: v2 = 2*s/(t1+t2) (where s is the length of the lap, t1 is the time needed for the first lap and t2 is needed for the second lap)3. since v2 = 2*v1 u can also write: 2*v1 = 2*s/(t1+t2)4. this u can devide with 2 on both sides and u get: v1 = s/(t1+t2)5. v1 was already defined in point 1 (v1 = s/t1) -…

oh, nothing special here, just a crowd of nerds

36 And yes, but chess is too exciting

16 next one:German: Die Summe zweier Zahlen ist doppelt so groß wie ihre (positive) Differenz. Ihr Produkt aber ist dreimal so groß wie ihre Summe. Um welche beiden Zahlen handelt es sich?English: the sum of 2 numbers is the double of their (positive) difference. their product equals 3-times their sum. what are the numbers?

argh, that was a trap

i found 40.

yeah, now that u say it i'm sorry, i didn't even try

physikally? if so: chatroom.

aww according to my art teacher even white is not a color.

ok, to come on topic again, here a simple math challenge:

right

The train has the same speed as the wind, 7 m/s = 25,2 km/h.

(Quote from (IOC)Wanderer)exact, and when i was a boy i used to go by steam train several times. but for a kid it was still fast (Quote from (IOC)Wanderer)2 boys and 1 sister.

(Quote from (IOC)Wanderer) i always hated this "x times fewer than" because it is a wrong use of language in math anyway, the result should then be: 4 brothers and 3 sisters