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Retired NBME 22 Answers

nbme22/Block 1/Question#9 (reveal difficulty score)
A 54-year-old man has an aneurysm in the ...
2.4 🔍 / 📺 / 🌳 / 📖
tags: calculation

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 +17  upvote downvote
submitted by ∗keycompany(351)
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lowF Rtea = ioVtleyc x -aCtisonSslorce aAer

2 m2^c x 20 mces/c x 06 csinem/ x 1 L1000/, cm3^ = 42. i/mLn

001,0 3^cm = 1 L

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seagull  el,lW I sesimd shit o.ne I otnd' eenv efel .bda +78
link981  @pkncoeaymy a lmals oy,tp 100 c^3m = 1 L tno 0m^013c0. 0 010 m3L=^ 1 L +1
hello  epmyocakny@ how idd uoy teid uryo oilraign ncmteom to fix yoru ytpo? +1
winelover777  ttrPey eurs yanycm@keop saw ctorr.ce 1 L = 1000 ^m.3c iesrhewOt teh nsreaw wdoul be 24. +4
drdoom  1 netmrcieet si a d.eiantsc A( l.eni) +1
drdoom  fI we ytlpuiml a inle yb htaeron ,einl ew etg a uesrfac ara.e A( ecepi of p.era)p +1
drdoom  fI ew lmuipytl het ceiep fo aeprp by aonther nl,ie we get u.vlmoe (A .eubc A ).box +1
drdoom  If we ifll eht xbo hitw a l,fdiu ew ilwl heav 1 mL of tihs .fuldi +1
drdoom  fI we ehav a doasuthn fo hstee xbseo, we heav 1 L fo .ldufi +1
drdoom  1o,oo mL = 1 tierL = 1oo,o ttere³nicem +1

if one still doesn't understand to add on .. 1000 cm^3 = 1000 ml 1000ml = 1 Litre

+5/- ribosome01(-3)

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 +6  upvote downvote
submitted by ∗nwinkelmann(366)
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Iev' enerv eenb good at eotgrnivcn tnusi :( oll so hda to sak my hr.eobtr eH oldt em atht:

ceidnsta × adseictn = cnsitade2 = aera

an,d

cieadnst × acsntdie × sniacdet = saiecntd2 × sadeticn = etnicads3 = ulomve

Gttoa oevl cibulp csloho for vener eenb agtuth htta ... ghees voisl(ouby 'eIv endo teh qiesnoatu nda f,utsf jtus eernv been ldot it htta wt/ytaha mspile be)eorf. nnKwiog atht smake girgnufi tuo hte oeuintqa mchu iesre:a

Folw tera = ilytcoev × CAS = 20 sc/mec × c2m2 = cm043cs/e

To ervcnto ot mn/i,L jtus ylmil:utp

m04c3/ecs × 06 me/nsic × m/L010c,103 = 2040 /,0L010 mni = 42. Linm/

eopH thsi l!peedh

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impostersyndromel1000  ot lla ym libpcu hoslco eespp tuo three d(an nto het einc lcbpiu olcshso ni irhc ar,ase the rela uipbcl ohs.o).slc. ew mdea i!t +4
angelaq11  Taylhflukn I asw atghtu who to revotcn tsuin, btu lte em ellt yuo ahtt I was OS lsot no hsti on.e stI' SSUEESL ot owkn how to do ti if uoy (,I I amne I) tnd'o kown the nmad olarumf .Dx iOsbvolyu ogt tshi eon ngowr, but t'is odog to nokw taht if it eerv scoem up ianga d(an I onkw it o)'ntw I laeryda wkon it. +2

This is all you need for conversions:

1cm3 = 1 ml ... thus 40 cm3 = 40 ml

So to make it faster I would do it like this

40 ml/sec * 60 sec/1min * 1L/1000ml = 2.4 L/min

+3/- majoav1(2)

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 +2  upvote downvote
submitted by seracen(15)
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,gUh s,ryro etnitgg sdue to het mgrttnfia,o dna ylelcaticnda ptsode ti ni eht rngwo .cepla

nAa,wyys ot ,arrteeite I sawlay juts oklo at het siu.nt It wants L,nim/ I'm iveng 2c^m and msc/ec

So I ylmil,utp ot gte elmuov uot of ti ^3m(),c nteh nvorect snsoced ot uentmsi.

u,shT 'ist ascaylbil x,2x26 ni oems phesa or ofrm tfera cinaplg the amcisedl riyet.arolappp odoG inhgt heyt dndti' add thta rlrtpuaaic kleniwr, llI' aekt ym redmliae htma silskl dan ugb ou,t .aha.h.

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 +1  upvote downvote
submitted by googaga(2)
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gTisnet igetnst 21.3 hsTi is a ttse opts ot ese fi htings nu ascmr bel by ypintg a emomcnt. Tak.nsh

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drdoom  i stecpre shit pttatme utb i d'tno tnihk it kwsro ahtt way +2


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 +0  upvote downvote
submitted by ∗usmleboy(19)
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iThs isuenqot swa no ym TMCA and I ldhgeua hnew I saw .it

hTsnig yuo aegv to wo:kn ^3cm = Lm , tneh who to ecvrnot insu.t

22c^m x 02 ecscm/ = 40^3mc / sce = 40 mL / sce

morF reeh stju venocrt 04 Lm / ecs to L / imn

40 Lm / esc x 1 L / 1000 mL x 06 sce / 1 mtenui = 24. L / min

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 -1  upvote downvote
submitted by ∗kernicterusthefrog(139)
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Jtus in scea tath lveylo tlltei oteuiqan idrpevdo yb nmyek@pacyo t'snwa queti uoenhg rfo uoy, esreh' a kinl to a erom meelptoc lxoaeatinnp yb nKah aemcd.yA pHlede e,m ewnh I koedlo at het oniqueta dan ia,sd a?aawah

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If, like me, you dislike memorizing formulas, but are okay doing the actual math, I always just look at the units. It wanted L/min, and I had to get it using cm^2 and cm/sec...

Well, I know cm^3 gives volume (L) after bashing out a few conversions, so multiply it is!

Then I know to turn seconds into minutes, so multiply by 60.

Now, at this point, I knew my decimals were off, but still, 4x6 = 24, so it's some version of that. Had they included 24 or .24 as answers, I'd have actually had to pay attention to my conversions.

Anyways, I hope that helps!

+4/- seracen(15)

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