Can You Solve The Math Exam Question For Students In Singapore That Went Viral?

This creative math problem on a Singapore exam for students aged 15-16 is stumping adults across the world.

This is the question:

To clear up any ambiguity, Cheryl tells Albert the month in which her birthday falls, and she tells Bernard the day's number. In other words, Albert is told either May, June, July or August. Bernard is told either 14, 15, 16, 17, 18 or 19.

The answer is written out below, but see if you can figure it out first!

correct answer and how it works out:

1. Albert doesn't know immediately - this gives us nothing by itself, because there are no single month choices.
2. Albert knows that Bernard doesn't know - this eliminates May and June, because were it either of those, there would have been a chance the date was May 19th or June 18th (which are unique dates), in which case Albert wouldn't have known definitively that Bernard doesn't know.
3.Bernard knows after deducing that May and June have been eliminated - this eliminates July 14 and August 14, because were it either of those dates, he would not have been able to say he knew for sure.
4.This leaves us with July 16, August 15, and August 17. After hearing Bernard knows, Albert also says that he knows - this is only possible if the remaining choice is unambiguous in terms of month. This eliminates the duplicate August dates, leaving us with July 16 as the answer.

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This Is What Your Finger Length Reveals About Your Personality

Can your personality be linked to the length of your fingers? The folks over at Higher Perspective say it is, so let's give it a try.

Hold up your left hand with your palm facing out and see which category you fall in - A, B, or C.

Now here is what they say:

(A) The charming but pragmatic one.
(B) The confident, get-it-done type.
(C) The peacenik.

People who have a ring finger longer than the index finger tend to be charming and irresistible to some at least. A's are the ones who can talk themselves out of just about any situation. Additionally, they're aggressive and excellent problem solvers. They tend to be incredibly compassionate and are often scientists, engineers, soldiers, and crossword puzzle masters.

People with shorter ring fingers than index fingers are the self-confident, get-it-done types. They love solitude in which to work and accomplish the things they need to do, but that doesn't necessarily indicate introversion. They're very goal oriented and don't like to be disturbed. They appreciate what they have but often hunger for more.

C's are the peace-loving conflict-avoiding types. People with even ring and index finger length are well organized and want nothing but to get along with everyone. They are faithful in relationships, tender and caring partners, but beware: C's have a fiery core that while suppressed in normal day-to-day activities can be dangerous if unleashed. They might be peaceniks, but please, stay on their good side.

Did they get it right?