Cheryl's Birthday Logic Puzzle

The video tutorial presents a deductive reasoning problem involving Albert, Bernard, and Cheryl. Cheryl gives Albert the month and Bernard the day of her birthday, and they must deduce the exact date. Through logical reasoning, Albert and Bernard eliminate possibilities based on their knowledge and dialogue. The problem is solved by analyzing the information from both perspectives, leading to the conclusion that Cheryl's birthday is on July 16th.

What information does Cheryl provide to Albert and Bernard?

• Both get the month.

• Albert gets the month, Bernard gets the day.

• Albert gets the day, Bernard gets the month.

• Both get the day.

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CCSS.8.EE.C.7B

Which months could Albert have been told if he knows Bernard does not know the birthday?

• June or August

• May or July

• July or August

• May or June

If Bernard was told the 14th, which months could still be possible?

• June and July

• May and June

• May and August

• July and August

Why can Albert be sure that Bernard does not know the birthday?

• Because Albert knows the month is May.

• Because Bernard was told the 14th.

• Because Albert knows the month is not May or June.

• Because Bernard was told the 18th or 19th.

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CCSS.7.EE.B.4A

What conclusion does Bernard reach after Albert's statement?

• He knows the birthday is in July or August.

• He knows the birthday is in May.

• He still doesn't know the birthday.

• He knows the birthday is in June.

What is the significance of Bernard knowing the birthday after Albert's deduction?

• It means the day is not the 14th.

• It means the day is the 18th.

• It means the day is the 14th.

• It means the day is the 19th.

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CCSS.RI. 9-10.1

CCSS.RI.6.1

CCSS.RI.8.1

CCSS.RL.6.2

CCSS.RL.9-10.2

What final deduction does Albert make to determine Cheryl's birthday?

• The month is July.

• The month is June.

• The month is May.

• The month is August.

What is Cheryl's birthday based on the deductions?

• August 15th

• June 18th

• July 16th

• May 19th

Why can't the birthday be in August according to Albert's final deduction?

• Because there are two possible days in August.

• Because the month is not May.

• Because Bernard was told the 14th.

• Because the month is not June.

What logical reasoning allows Bernard to finally know the birthday?

• He knows the day is the 19th.

• He knows the day is not the 14th.

• He knows the month is May.

• He knows the month is June.