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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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Fwlo etaR = Vyotceli x -acsseClioronSt aerA

2 m2^c x 20 mce/cs x 06 /sicemn x 1 ,100/0L mc3^ = 42. /imLn

1000, mc^3 = 1 L

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seagull  lel,W I dseism hsti .eno I notd' neev fele ad.b +78
link981  oymn@ykecpa a mlals typ,o 010 cm^3 = 1 L otn c30001.m^ 000 1 3=L^m 1 L +1
hello  n@poymekyca how idd yuo dite oryu ilriaogn nmtecmo to xfi yrou yo?tp +1
winelover777  tyPert eurs ypmona@ykce wsa o.crecrt 1 L = 0001 c.m^3 rhOtwesie eth nsrawe ldouw eb .42 +4
drdoom  1 tetecnemir si a ds.ceinta (A .i)nel +1
drdoom  fI we imluyptl a inel by aehnrot i,len ew get a cusefra .raea (A ceiep of .pae)rp +1
drdoom  fI we litpymul the cieep fo rpeap yb tnherao len,i ew get ml.ouev A( ecu.b A b.ox) +1
drdoom  If we llfi eth obx with a li,ufd ew liwl avhe 1 mL fo ihts di.ful +1
drdoom  If we veah a onuthsad fo hstee exbso, we vahe 1 L fo .udfli +1
drdoom  o,o1o mL = 1 eriLt = 1ooo, ³irnmteecte +1

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

+5/- ribosome01(-3)


 +6  upvote downvote
submitted by ∗nwinkelmann(366)
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Iev' vreen bene dogo at ncongrtvie snuti (: oll os adh to ask ym rhoetr.b He lotd em at:th

istnaecd × ciatsden = ndisacet2 = aear

dan,

enatcdis × astcenid × iecatsnd = nscdtiea2 × eiactsnd = sdtnecia3 = umevlo

atGto olev iblucp loohcs orf rveen bene huttga hatt ... gshee ovoyisl(bu v'Ie done the etaoqsniu nad uts,ff stuj never ebne ltod ti that awttyh/a lpmeis rof).ebe nowKnig ttha smeka niufirgg tuo the eaoitqun mchu easr:ie

Fwol etra = ceyoltiv × ACS = 20 ccems/ × c2m2 = c4m03cs/e

oT nocrevt ot n,imL/ tusj ty:millup

c40m3/cse × 60 e/imncs × m,1100c/0L3 = 0042 010L/0, nim = 4.2 L/nim

poeH this e!hepld

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impostersyndromel1000  to lal my ibpucl ochslo ppsee tuo etrhe dna( not eth eicn cupilb scloosh ni hcri aesar, teh laer pbculi hsso).o.c.l we eadm it! +4
angelaq11  yfkTunllha I wsa agutht owh ot rncvtoe tsun,i utb etl em tlle uoy atht I aws OS ostl on this ne.o It's USSESLE ot nwko ohw ot od ti fi oyu ,(I I amne I) do'tn konw hte amnd omuaflr Dx. vuOoyblsi otg hsti eno ng,orw tub its' ogdo to oknw atht if it erve mecso up igaan (dan I knwo ti to)w'n I aearydl kown i.t +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)


 +2  upvote downvote
submitted by seracen(15)
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Ugh, r,ryso egttgni dsue ot hte gtnri,atfmo nda dcleticaaynl spedto ti ni eth orgnw .lepca

ywn,ysAa to e,tertriea I lsawya usjt loko at eht tsui.n It tnasw /,Lnmi I'm nveig mc2^ adn scm/ce

oS I tmlpiyl,u to teg meuvol out of it ^,c3)(m tneh eoctnrv sdosnce ot tinus.em

uThs, 'tsi laslbicay 2x6,x2 in eoms eshap ro mrfo aefrt plgacin eth laisedcm yp.taoairlpepr odGo tginh ethy tddi'n add taht aurrtpaicl ewlkrn,i I'll akte my emlierda tahm sllkis nda ubg t,uo haah...

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 +1  upvote downvote
submitted by googaga(2)
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tsgeTin itngtse 213. hsTi is a estt otsp ot ees if itsnhg nu sracm ble yb nytgip a mec.tnom hks.naT

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drdoom  i terscpe shit amtttep btu i td'on htkin ti wksor htat way +2



 +0  upvote downvote
submitted by ∗usmleboy(19)
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hiTs outeisqn wsa no ym ATCM nda I huaegdl hwen I wsa .it

snghTi you vaeg to nwo:k 3^cm = Lm , hetn who to vtnerco iutsn.

2cm2^ x 02 cec/ms = c^0m43 / cse = 40 Lm / sce

Fmro eher tusj netrvoc 40 Lm / ecs ot L / mni

04 Lm / sec x 1 L / 0001 Lm x 60 ecs / 1 etinum = 24. L / mni

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 -1  upvote downvote
submitted by ∗kernicterusthefrog(139)
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tJsu ni scae thta vollye ltltei iuaqotne doevdipr by ymecp@aknyo stn'aw eqitu ghonue ofr uy,o ees'rh a nlik to a erom ecploetm palxtnonaei by Kanh .Aadcmye lHeepd m,e wenh I okleod at eht enatquoi and id,as hawa?aa

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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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