On which day of the week did June 25, 1987, fall?

[netigen]

June 25, 1982, fell on a Friday. On which day of the week did June 25, 1987, fall?
A. Sunday
B. Monday
C. Tuesday
D. Wednesday
E. Thursday

[aatech]

What's the source of this question.. can we really see such types on GMAT???

[rros0770]

Does it state if it is taking Leap Years into account? I'm assuming there is one leap year, in which case the answer is Thursday (E).

The max number of leap years possible in this time period are 2, but we know there was only 1 because if there were 2, that would make the date a Friday, and Friday is not in the answer choices.

Of course, it could always be Wednesday if they are ignoring leap years altogether...

Correct me if I'm wrong

Rob

[netigen]

My answer is also E

[aatech]

Can you please post your method of finding it too?

[egybs]

It's E. since 1984 is divisible by 4, it was a leap year.

We also know that as every normal year passed the same date will fall on the next day. During leap years, it'll fall two days later.

So

since 1982 is a Friday:
83 Sat
84 Mon (because of leap year)
85 Tue
86 Wed
87 Thu

[chidcguy]

Yep 1984 is a leap year Hence the answer is E.

[rros0770]

Good explaination egybs. That's exactly how I derived my answer above. Good looks.

Rob

[beeparoo]

...since 1984 is divisible by 4, it was a leap year.

We also know that as every normal year passed the same date will fall on the next day. During leap years, it'll fall two days later.

That sort of factual trivia is too obscure for the GMAT test-makers to assume we know. I don't qualify this question to be of GMAT calibre.

On the other hand, that was a good solve. So props to you, man.

Sandra

[egybs]

Heh I'm glad to hear... I had to reach WAAY back into time to remember this nonsense.

Where in Canada are you from? I'm originally from Montreal, but now live in San Francisco.

...since 1984 is divisible by 4, it was a leap year.

We also know that as every normal year passed the same date will fall on the next day. During leap years, it'll fall two days later.

That sort of factual trivia is too obscure for the GMAT test-makers to assume we know. I don't qualify this question to be of GMAT calibre.

On the other hand, that was a good solve. So props to you, man.

Sandra

[netigen]

You guys are funny.

A leap year is defined as a year which is divisible by 4. Divide a year by four, if the remainder is zero it's a leap year.

After reading all the comments here, I now understand why the question originally said 1984 is a leap year. I just assumed it to be unnecessary information.

[jasonc]

...since 1984 is divisible by 4, it was a leap year.

We also know that as every normal year passed the same date will fall on the next day. During leap years, it'll fall two days later.

That sort of factual trivia is too obscure for the GMAT test-makers to assume we know. I don't qualify this question to be of GMAT calibre.

On the other hand, that was a good solve. So props to you, man.

Sandra

you don't need to know any trivia to solve this problem.
365 days in a year, 7 days in a week, divide the 2 and you get reminder of 1 => every year the day of the week will advance by 1.

As for 1 or 2 leap years, we still don't need to know that leap years are divisible by 4, since as stated previously by another poster, Friday is not a choice, so we know that there must have been only 1 leap year.

but, I do agree with you... I doubt questions like this would be on the test...

[egybs]

The only issue is that there are some really obscure rules with regard to leap years... It's more than just divisibility by 4. So there are some years, where it is divisible by four, but it still isn't a leap year. So it actually could have 0, 1 or 2 leap years in the time period. Wednesday is an answer, so you do need to know something to answer this properly.

Regardless, it definitely does seem too obscure.

...since 1984 is divisible by 4, it was a leap year.

We also know that as every normal year passed the same date will fall on the next day. During leap years, it'll fall two days later.

That sort of factual trivia is too obscure for the GMAT test-makers to assume we know. I don't qualify this question to be of GMAT calibre.

On the other hand, that was a good solve. So props to you, man.

Sandra

you don't need to know any trivia to solve this problem.
365 days in a year, 7 days in a week, divide the 2 and you get reminder of 1 => every year the day of the week will advance by 1.

As for 1 or 2 leap years, we still don't need to know that leap years are divisible by 4, since as stated previously by another poster, Friday is not a choice, so we know that there must have been only 1 leap year.

but, I do agree with you... I doubt questions like this would be on the test...

[netigen]

The exception to the rule you are referring to only applies to the century year and it says that every year divisible by 100 will not be a leap year unless and until it is also divisible by 400.

for e.g. 1900 was not a leap year but 2000 was.

Clearly the years in question are not a century year i.e. divisible by 100.

[egybs]

Yes, i know... that's my point.. that you need to know some information about leap years!

The exception to the rule you are referring to only applies to the century year and it says that every year divisible by 100 will not be a leap year unless and until it is also divisible by 400.

for e.g. 1900 was not a leap year but 2000 was.

Clearly the years in question are not a century year i.e. divisible by 100.