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Interview Question

Project Analyst Interview

How many ridges around a quarter?

Answer

Interview Answer

17 Answers

9

Make some assumptions:
1. the circumference of a quarter is ___ inches.
2. the average ridge is 0.__ inches wide.
3. do the math.

Gil on 30 Dec 2010
1

4. If you go around the face of the quarter, you'll pass 4 ridges.

Tom M on 30 Dec 2010
1

Count the troughs. There will be an equal number of ridges.

Ed C on 31 Dec 2010
1

Enough to go all the way around!

nb on 4 Jan 2011
2

None of the ridges on a quarter go around it. All of the ridges on a quarter are orthogonal to the plane of the faces.

Jon A on 4 Jan 2011
12

119 on a quarter and 118 on a dime

i looked it up :)

Steve on 11 Jan 2011
4

Jon A. was on the right track. There are only 2 ridges which "go around" a quarter...the top ridge (heads side) and bottom ridge (tails)!

Dan B. on 11 Jan 2011
1

2 - one around the top and one around the bottom.

Mark on 11 Jan 2011
0

Work for someone else

hmm on 11 Jan 2011
1

I don't know...let's count them.

John on 11 Jan 2011
1

Just dip in ink and make it roll on a piece of paper, then count!

Phil on 12 Jan 2011
0

Who cares.

Diane on 12 Jan 2011
0

So what is the correct answer? I am persuaded by Dan B. and Jon A. that the answer to this question is "2" --

AND SHOULD ONE ASSUME, such a trick, or a tricky, question during a job interview, that the answer ought to be calculable right then and there? If so, common sense dictates that the answer in this case does NOT involve counting individual ridges positioned orthagonally to the face of the coin....

p.s. I have not searched elsewhere for an answer but rather am restricting my wondering to this site.

placebo on 16 Jan 2011
0

oops - this sentence should have started -

"AND SHOULD ONE ASSUME, for such a trick, or tricky, question..."

placebo on 16 Jan 2011
0

looks like Steve got the job cuz he looked it up!

trent on 17 Jun 2011
0

Phil had a very clever answer that interviewers would love.

Jason on 22 Nov 2011
0

Twice as many there are along 1/2 the coin's circumference.

Alan on 28 Jan 2013

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