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Entry Test MCQ :: Numbers

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41.  If (x+1) times (2x+1) is an odd integer then x must be:
A. an odd integer B. an even integer
C. a prime number D. a composite number
E. a negative number    
42.  If a < b and b < c then which of the following must be true?
A. b+c < 2a B. a + b
C. a-b D. A+b<2c
E. a+b < 2b    
43.  How many of the numbers in the following list are NOT even numbers? 0.32 140/5 0.4444 0.34 -2.6 2/8 ?36 36/12 etc
A. 1 B. 2
C. 3 D. 4
E. 5    
44.  A number is thrift if it is a multiple of 2 or 3. How many thrift numbers are there between -15 and 15?
A. 18 B. 9
C. 19 D. 15
E. 17    
45.  If x and y are primes greater than 2 which of the following must be true? I- x+y is even II- xy is odd III-x2-y2 is even
A. I only B. II only
C. I and II only D. VI and III only I II and III
46.  If
A. I only B. II only
C. I and II only D. I and III only
E. I II and III    
47.  What is the value of
A. 1 B. 2
C. 3 D. 4
E. 6    
48.  Which of the following is equal to 96x95)20?
A. 81 B. 9???
C. 9 D. 9
E. 81    
49.  If 0
A. ?a a a2 B. a2 a ?a
C. a2 ?a a D. a a2 ?a
E. a ?a a2    
50.  If 4080=x(80 40) what is the value of x?
A. 2?? B. 20??
C. 40?? D. (1/2)??
E. (1/2)??    

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