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Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts.
09 May 2022, 01:30
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
69% (01:30) correct
31%
(01:35)
wrong
based on 197
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Mr. And Mrs. Smith and their son John want to cross the Dart River. The only way across is with Mr. Jones in his rowboat. Mr. Jones will not allow anyone to row his boat and will take only one passenger at a time. John is only a little boy so he cannot be left alone on the river bank.
Which of the following conditions are not part of the successful passage of the Smiths across the river?
(A) Mr. Smith crosses the river first.
(B) Mr. Smith crosses the river last.
(C) Mr. and Mrs. Smith do not cross together.
(D) John crosses the river first.
(E) John crosses the river second.
Which of the following conditions are not part of the successful passage of the Smiths across the river?
(A) Mr. Smith crosses the river first.
(B) Mr. Smith crosses the river last.
(C) Mr. and Mrs. Smith do not cross together.
(D) John crosses the river first.
(E) John crosses the river second.
Updated on: 09 May 2022, 05:44
Originally posted by debjit1990 on 09 May 2022, 03:43.
Last edited by debjit1990 on 09 May 2022, 05:44, edited 1 time in total.
Last edited by debjit1990 on 09 May 2022, 05:44, edited 1 time in total.
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Ans:D
(A) Mr. Smith crosses the river first.
(B) Mr. Smith crosses the river last.
(C) Mr. and Mrs. Smith do not cross together
(D) John crosses the river first...correct
(E) John crosses the river second.
(A) Mr. Smith crosses the river first.
(B) Mr. Smith crosses the river last.
(C) Mr. and Mrs. Smith do not cross together
(D) John crosses the river first...correct
(E) John crosses the river second.
09 May 2022, 04:45
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One strong base for analyzing the answer is holding the point that john has not to be left alone, so either one of his parents has to be present or Jonas has to be present with him.
Let's jump on to the options
(A) Mr. Smith crosses the river first : Mr. smith can cross the river without violating that john is alone, as Mrs. smith is with John
(B) Mr. Smith crosses the river last.: Mrs. smith can cross the river without violating that john is alone, as Mr. Smith is with John
(C) Mr. and Mrs. Smith do not cross together : Both Mr. and Mrs. Smith can cross the river considering the fact that John is with Jonas.
(D) John crosses the river first.: Can't be true, if john crosses the river first, he has to stay on the opposite side of the river alone while Jonas has to bring the boat back to Mr. and Mrs. Smith
(E) John crosses the river second: Yes, possible. If john crosses 2nd, he wont be alone in either side. Doesn't go against the statement.
Let's jump on to the options
(A) Mr. Smith crosses the river first : Mr. smith can cross the river without violating that john is alone, as Mrs. smith is with John
(B) Mr. Smith crosses the river last.: Mrs. smith can cross the river without violating that john is alone, as Mr. Smith is with John
(C) Mr. and Mrs. Smith do not cross together : Both Mr. and Mrs. Smith can cross the river considering the fact that John is with Jonas.
(D) John crosses the river first.: Can't be true, if john crosses the river first, he has to stay on the opposite side of the river alone while Jonas has to bring the boat back to Mr. and Mrs. Smith
(E) John crosses the river second: Yes, possible. If john crosses 2nd, he wont be alone in either side. Doesn't go against the statement.
