GMAT Math: 4
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how can u be sure its 1.8..... im prety sure the book made a mistake
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yes the diagram for question 20 is wrong e is less than 2 a little bit before 2 while going for -2 gives the greatest answer which is correct choice
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Problem 20 has a typo in the book. The teacher's edition has and arrow pointing to a point on the line as an answer option. But yes, without that arrow the answer could be -2 or 2.
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Diagram wrong on question 20 ...the number line has no negatives, and E is closer to 0 than A....look carefully.....but thanks for all your help anyway ^ & ^
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After looking at the diagram in the book it looks like E is less than 2 and D is slightly more than one. A is exactly -2 so the answer is A.
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the diagram for ques 20 is wrong....A is the answer....E is less than 1
10:59
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GMAT Math 21by khanacademy4,961 views
look at the picture carefully guys... the arrows corresponding to A, B, C, D, E are not -2, -1, 0, 1, 2 respectively.
A = -2
B= -1.2ish
C= 0
D= 1.2ish
E= 1.8ish
therefore, A and only A is the right answer like the book says because A is furthest away from 0. I promise Dr. Khan!
sysunder 2 years ago 3
Pl refer to question 21. May I suggest following. For an odd integer to be expressed as sum of two prime number, one of them must be 2. Reason is that 2 is only even prime no. and sum of even + odd integer results in odd no. Therefore choice E i.e. 23 should be equated ONLY as 2 + 21. Since 21 is not a prime number, 23 can not be expressed as sum of two prime numbers. I suggest sequence of choice evaluation should be to evaluate all choices which are odd numbers.Keep choice with even no. as last
ChocoFudge21 2 years ago 3