Unit test - Reasoning and Proving

Which number is a counterexample to the following statement? : 
All numbers that are divisible by 2 are divisible by 4

• 0
• 12
• 28
• 42

Tags

CCSS.4.OA.B.4

• A
• B
• C
• D

Tags

CCSS.6.EE.B.6

Used to prove that a conjecture is false.

• Counterexample
• Inductive Reasoning
• Concluding statement
• Conjecture

Complete the conjecture.  Think of examples to help.
The product of any two odd numbers is _____________

• even
• odd
• zero
• positive

Tags

CCSS.7.NS.A.3

CCSS.7.NS.A.2

What are the missing numbers in this pattern?
23, 33, ___, 53, ___, 73

• 32, 62
• 42, 63
• 43, 63
• 42, 62

Tags

CCSS.2.NBT.A.2

How many blocks would be in the next picture?

• 14
• 9
• 10
• 12

Tags

CCSS.4.OA.C.5

Which is a counterexample of: The difference of two numbers is less than the greater number.

• (5) - (2) = 3
• (-5) - (4) = -9
• (2) - 0 = 2
• (3) - (3) = 0

Tags

CCSS.7.NS.A.3

Use inductive reasoning to predict the next three numbers in the pattern.  9, 3, 1, 1/3, 1/9

• 1/27, 1/81, 1/243
• 1, 2, 3
• 27, 81, 243
• 6, 12, 15

Tags

CCSS.3.OA.D.9

What comes next in the pattern?

• acorn
• pumpkin

Tags

CCSS.HSF.BF.A.2

What is a conjecture?

• A statement believed to be true based on observations.
• An example which disproves an hypothesis.
• the performance of tricks that are seemingly magical