Exam

Now it's your turn
1.- The decimal number that is equivalent to 3/7 is:

a) 0.4
b) 0.4242...
c) 0.428571428571...
d) 0.4285

2.- The fraction that is equivalent to 1.03 is:

a) 103/10
b) 103/100
c) 10.3/10
d) 103/99

3.- The fraction that is equivalent to 1.0333...   is:

a) 93/90
b) 103/100
c) 93/99
d) 103/90

4.- Which of the following sentences is true?

a) All the Natural Numbers are Real Numbers
b) π is a Real Number
c) There are infinite Real Numbers that are not Rational Numbers
d) All of them

5.- The higher approximation of 1/3 to the nearest tenths is:

a) 0.3
b) 0.4
c) 0.33
d) 0.34

6.- The rounding of 1/3 to the nearest tenths is:

a) 0.3
b) 0.4
c) 0.33
d) 0.34

7.- The absolute error when we approximate 1/7 by 0.1 is:

a) 0.042
b) lower than a tenth
c) lower than 0.042
d) None of them

8.- The relative error when we approximate 1/7 by 0.1 is:

a)  lower than 0.3
b) 3%
c) 30%
d) lower than 30%

9.  1.030.000.000.000.000 in scientific notation is:

a) 1·1015
b) 1.03·1013
c) 103·1013
d) 1.03·1015

10.      3·109+ 1.02·108  equals (in scientific notation)

a) 31.02·108
b) 4.02·1017
c) 3.102·109
d) None of them

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