TEST BANK A PROBLEM SOLVING APPROACH TO MATHEMATICS

TEST BANK

,MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Determine whether the following is a statement. If it is, then also classify the statement as true or false.
1) Why don't you come here?
A) Not a statement B) False statement C) True statement
Answer: A

2) This room is big.
A) True statement B) Not a statement C) False statement
Answer: B

3) 5 - 1 = 4
A) True statement B) Not a statement C) False statement
Answer: A

4) 7x + y = 3
A) False statement B) True statement C) Not a statement
Answer: C

5) Can you bring the book?
A) True statement B) Not a statement C) False statement
Answer: B

6) x + y = x - y, where y = 0
A) False statement B) True statement C) Not a statement
Answer: B

7) 12 = 3y
A) Not a statement B) False statement C) True statement
Answer: A

8) 2.4 = 5.2
A) False statement B) Not a statement C) True statement
Answer: A

9) The state of California is in North America.
A) Not a statement B) False statement C) True statement
Answer: C

10) Brazil is in Asia.
A) True statement B) Not a statement C) False statement
Answer: C

Use a quantifier to make the following true or false, as indicated, where x is a natural number.
11) x + x = 6 (make true)
A) There is no natural number x such that x + x = 6.
B) For all natural numbers x, x + x = 6.
C) There exists a natural number x such that x + x = 6.
D) For every natural number x, x + x = 6.
Answer: C

, 12) x3 = 8 (make true)
A) No natural number x exists such that x3 = 8.
B) Every natural number x satisfies x3 = 8.
C) There exists a natural number x such that x3 = 8.
D) Three natural numbers x exist such that x3 = 8.
Answer: C

13) 2x + 1 = 5 - x (make true)
A) No natural number x exists such that 2x + 1 = 5 - x.
B) There exists a natural number x such that 2x + 1 = 5 - x.
C) Only two natural numbers x exist such that 2x + 1 = 5 - x.
D) For every natural number x, 2x + 1 = 5 - x.
Answer: B

14) 12x = 5x + 7x (make false)
A) For every natural number x, 12x = 5x + 7x.
B) There is no natural number x such that 12x = 5x + 7x.
C) More than one natural number x exists such that 12x = 5x + 7x.
D) There exists a natural number x such that 12x = 5x + 7x.
Answer: B

15) x - 13 = 13 - x (make false)
A) For x = 13, x - 13 = 13 - x.
B) There exists a natural number x such that x - 13 = 13 - x.
C) At least one natural number x exists such that x - 13 = 13 - x.
D) There is no natural number x such that x - 13 = 13 - x.
Answer: D

16) 4x = 7x (make false)
A) There is no natural number x such that 4x = 7x.
B) For every natural number x, 4x = 7x.
C) No natural number x satisfies 4x = 7x.
Answer: B

Write the statement indicated.
17) Write the negation of the following:
The test is difficult.
A) The test is not difficult. B) The test is not very easy.
C) The test is very difficult. D) The test is not easy.
Answer: A

18) Write the negation of the following:
8 + 2 = 10
A) 8 + 2 = 12 B) 8 + 2 = 2 + 8
C) The sum of 8 and 2 is ten. D) 8 + 2 ≠ 10
Answer: D

, SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

Provide an appropriate response.
19) Negate the following: The store is sometimes open on Sunday.
Answer: The store is never open on Sunday.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Construct a truth table for the statement.
20) ~p ∧ ~s
A) p s (~p ∧ ~s) B) p s (~p ∧ ~s) C) p s (~p ∧ ~s) D) p s (~p ∧ ~s)
T T T T T F T T F T T F
T F F T F F T F F T F T
F T F F T F F T F F T T
F F T F F F F F T F F T
Answer: C

21) s ∨ ~(r ∧ p)
A) s r p s ∨ ~(r ∧ p) B) s r p s ∨ ~(r ∧ p)
T T T T T T T T
T T F T T T F T
T F T T T F T T
T F F T T F F T
F T T F F T T F
F T F T F T F T
F F T T F F T T
F F F F F F F T
Answer: B

22) (p ∧ ~q) ∧ t
A) p q t (p ∧ ~q) ∧ B) p q t (p ∧ ~q) ∧ t
T T T F T T T F
T T F F T T F F
T F T F T F T T
T F F F T F F F
F T T F F T T F
F T F T F T F F
F F T T F F T F
F F F T F F F F
Answer: B