There are exactly twelve children in Ryan’s class. Only four of the children are boys. The following questions refer to a time when all the children are present in the class. There are no visitors in the class. There might be more than one correct anwer to a question. 1. Which of the lettered statements must be true? 2. Which of the lettered statements cannot be true? 3. Which of the lettered statements could be true or not true? a. There are twice as many girls as boys in Ryan’s class. b. There are eight more girls than boys in Ryan’s class. c. There are four more girls than boys in Ryan’s class. d. If Ryan is sitting at a table with all the girls, there are exactly nine children at that table. e. If only three of the boys are standing on their heads, one of the boys is not standing on his head.

How some boys should "stand on their head" in a classroom? This statement is not valid

Here is your problem pasted again ingluding some of my thoughts. These thoughts and the answers to your questions are in CAPITAL.
There are exactly twelve children in Ryan's class. Only four of the children are boys. THAT MEANS THERE ARE 8 GIRLS. The following questions refer to a time when all the children are present in the class. THAT MEANS THE TOTAL PERSONS IN THE CLASS ARE 12 SINCE THERE IS NO MENTION ABOUT TEACHER. There are no visitors in the class. There might be more than one correct anwer to a question.

1. Which of the lettered statements must be true?
2. Which of the lettered statements cannot be true?
3. Which of the lettered statements could be true or not true?

a. There are twice as many girls as boys in Ryan's class. IS TRUE
b. There are eight more girls than boys in Ryan's class. IS FALSE
c. There are four more girls than boys in Ryan's class. IS TRUE
d. If Ryan is sitting at a table with all the girls, there are exactly nine children at that table. IS TRUE
e. If only three of the boys are standing on their heads, one of the boys is not standing on his head. IS TRUE.

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