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Are you smarter than a ten year old?

hellfire Avatar
6y, 11m agoPosted 6 years, 11 months ago
As it turns out I'm not. Helping my son with his homework tonight we both got stuck on the second question. No calculators allowed!
hellfire Avatar
6y, 11m agoPosted 6 years, 11 months ago
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#1
After exercise a child will have a pulse rate of about 210 beats per minute. An adult's is nearer 190 b.p.m. To estimate maximum pulse rate calculate 220 minus age (in years)

In a marathon, a 32 year old woman runs with maximum effort for 25 minutes. What would her pulse rate be?

Another runner runs the same distance, again with maximum effort, but takes 30 minutes. During that time her heart beats 5730 times. How old is she?
#2
you sure hes not doing A level?
#3
plumberman01
you sure hes not doing A level?


I wish, I wouldn't feel as dense then :oops::-D
#4
I'm guessing that you meant:-

220 minus age in years...
#5
To estimate maximum pulse rate calculate 22 - age (in years)


So my maximum pulse rate is -17? That doesn't sound right.
#6
what! :o
#7
Shengis
So my maximum pulse rate is -17? That doesn't sound right.


Sorry 220, can't even get that bit right!!
1 Like #8
188/29? It's only an estimate after all :lol:
1 Like #9
The first one is 188....

2nd one is simply 5730 divided by 30, which will give 191 bpm (therefore 29)
1 Like #10
How about...

1)
220 - 32 = 188 pulse rate

2)
220 * 3 = 660
5730 / 10 = 573

660 - 573 = 87

87 / 3 = 29 years old
#11
OP do u feel your son gets too much homework for a ten year old? My son is also ten and I am so sick of the amount of homework he gets. Its at least an hours worth every night - and fitting that into taking him to his clubs etc its a nightmare.

Sometimes am stuck as well when doing it!

edit - last nights maths took us nearly two hours - I was fuming by end of it !
#12
anooobist
2)
220 * 3 = 660
5730 / 10 = 573

660 - 573 = 87

87 / 3 = 29 years old


A bit overcomplicated. Beats/Minutes then 220-The answer as in Q1
1 Like #13
how about 5730 divided by minutes ran (30) = 191

220-191= 29

Answer= 29 years old
#14
It's the way my mind works... sigh...
#15
anooobist
How about...

1)
220 - 32 = 188 pulse rate

2)
220 * 3 = 660
5730 / 10 = 573

660 - 573 = 87

87 / 3 = 29 years old


Can you explain the rationale behind the workings? Don't understand why you did what you did!

bossyboots
OP do u feel your son gets too much homework for a ten year old? My son is also ten and I am so sick of the amount of homework he gets. Its at least an hours worth every night - and fitting that into taking him to his clubs etc its a nightmare.

Sometimes am stuck as well when doing it!


Mine does about an hour four days a week and then has spelling etc on top. More than I had
#16
anooobist
It's the way my mind works... sigh...


Are you Carol Vorderman :lol:
#17
moorey7
how about 5730 divided by minutes ran (30) = 191

220-191= 29

Answer= 29 years old


Ahhhhhhhhhhh! Makes sense.
#18
i did it by 5730/10 = 573
573/3 = 191

220 - 191 = 29

quite tricky to do in my head tho
#19
thfc andyp3
The first one is 188....

2nd one is simply 5730 divided by 30, which will give 191 bpm (therefore 29)


:lol: ;-)
#20
'the rationale behind the workings' - avoiding dividing by 30 and a twisted mental process...
#21
anooobist
'the rationale behind the workings' - avoiding dividing by 30 and a twisted mental process...


:w00t: nothing wrong with a twisted mental process......it's just explaining it to others that is a pain :-D
#22
Shengis
:lol: ;-)


:whistling:
#23
thfc andyp3
:whistling:


Had already been noted and marked accordingly, check rep time against last post :p
1 Like #24
1. 220 - 32 = 188
2. 220 - (5730/30) = 220 - 191 = 29

Will check above when I've posted!
Mental arithmetic prolongs the grey cells!!

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