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Key Concepts Section 1.6 Quiz
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1.6 Focus on Reasoning and Proving
Reasoning using Systematic Trial (27.0K)

1
How many digits are in the largest number that you can generate using mathematical operations and four 1's?
A)4
B)8
C)10
D)12
2
Linda has invented a new mathematical operation such that 4 ¡ 5 = 24. Brian conjectures that this means to start with 4, and add 5 four times. What would Brian predict for 8 ¡ 3?
A)32
B)28
C)12
D)Brian's conjecture does not work for the first example.
3
Write down the integers from 9 to 1, in reverse order. Place addition signs in appropriate places such that you arrive at a total of 99. What is the minimum number of addition signs needed?
A)7
B)6
C)5
D)It is not possible to arrive at a total of 99.
4
A wooden toy has two faces, one vertex, and one edge. A possible shape for this toy is
A)a cube
B)a cylinder
C)a cone
D)a pyramid
5
Clifford kept track of sky cover during his time at a summer camp. He found that there were 10 days with cloudy skies, but not for the whole day. If the morning was cloudy, the afternoon was clear, and vice-versa. There were 6 clear mornings and 9 clear afternoons during his stay. How long was he at camp?
A)15 days
B)12 days
C)11 days
D)10 days





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