maths poser?

[quizmouse]

of two positive numbers, the first is one fifth of the second.
if their product is 2645 what are the two numbers??
A bath fills in 12 min using only the hot tap in 15 min using only the cold and in 20 min using the shower..How long does it take using all 3 together?
How long is the hypoteneuse of a rt angled triangle whose other sides are 7 and 24?
139639 is the result of multyplying two prime numbers what are they??
I think these are ridiculous in a gen knowledge quiz personally but there we are?/
thanks diane

[gen2]

1 = 23 and 115 (or -23 and -115)

2 = 5 mins

3 = 25

[gen2]

4 = 311 x 449

http://www.alpertron.com.ar/ECM.HTM

[GlenB]

1 23 and 115
2 In 1 minute hot tap will fill 1/12th bath, cold 1/15th, shower 1/20th = total 12/60th = 1/5th
So bath will fill in 5 minutes with all three running
3 7 squared (49) + 24 squared (576) = 25 squared (625) so answer is 25
4 449 and 311 ((by trial and error and calculator!)

[gen2]

I answered this this afternoon at 13:46 as gen2 but all my answers disappeared down the plug hole. In case you didn't see it, I re-registered as gen_2 and I reposted my replies below: They too failed to appear. I am now attempting to post my answers from the beta version of this website:



1 = 23 and 115 (or -23 and -115)

2 = 5 mins

3 = 25

4 = 311 x 449

http://www.alpertron.com.ar/ECM.HTM

[GlenB]

Apologies . I now realise that by putting question numbers 1,2,3,4 it might have confused. Should have left bigger spaces!
To clarify 23 and 115
5 miniutes
25
449 and 311

[gen2]

Better late than never! - The AB technicians seem to have done their job and reinstated my replies that they stole on Sunday.

It now looks a confusing mess if quizmouse or GlenB look back on this thread again!