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6
Q:

Which of the following can be used to illustrate that not all prime numbers are odd? 

 

A) 1 B) 2
C) 3 D) 4

Answer:   B) 2



Explanation:

The only even numbers in the list are 2 and 4, but 4 is not a prime. So 2 can be used to illustrate the statement that all primes are not odd.

Subject: Numbers
Exam Prep: GRE
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The 3rd and 6th term of an arithmetic progression are 19 and 37 respectively. What is the 13th term?

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Answer & Explanation Answer: A) 79

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Sum of twice a fraction and 5 times its reciprocal is 7. What is the fraction?

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The  sum  of  three  prime  numbers  is  100.  If  one  of  them  exceeds  another  by  36,  then  one  of  the numbers is

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Answer & Explanation Answer: D) none

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Which of the following statements is not true?

A) The difference of two prime numbers, both greater than 2, is divisible by 2 B) For two different integers m, n and a prime number p, if p divides the product m × n, then p divides either m or n.
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Answer & Explanation Answer: D) There is only one set of three prime numbers such that there is a gap of 2 between two adjacent prime numbers.

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Q:

Consider  the  multiplication  999  ×  abc  =  def132  in  decimal  notation, where  a,  b,  c,  d,  e  and  f  are digits. What are the values of a, b, c, d, e and f respectively?

A) 6, 6, 8, 6, 8, 7 B) 8, 6, 8, 6, 7, 8
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Answer & Explanation Answer: D) 8, 6, 8, 8, 6, 7

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How many pairs (A, B) are possible in the number 479865AB if the number is divisible by 9 and it is given that the last digit of the number is odd?

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Answer & Explanation Answer: A) 5

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Which one of the following is an irrational number?

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