Prime & Composite Numbers
True or False:
47 is a composite number
False - 47 is a prime number
True or False:
The prime factorization of 412 is 2x2x103
True
True or False:
The power of 25x25x25x25x25x25 = 257
False - The power of 25x25x25x25x25x25 = 256
True or False:
The standard form for 8x106 +1x105=5x1 is 815
False - the standard form is 810,001
True or False:
The factors of 206 are
1,2, 112, 206
False - the factors of 206 are
1,2,103, 206
(1x206, 2x103)
True or False:
The LCM (lowest common multiple) of 78 and 442 is 2
LCM: 1326
(78 x17)
442 x 3)
True or False:
The square root of 775 is a perfect square
False - The square root of 775 is 24.27
True or False:
The answer to the equation
[(6.52-4)2+ square root40+9x9)]2 is 2,172,856.57
True
Determine whether the number below is a prime or composite number, if its composite list its factors
165
1,3,5,11,15,33,55,165
(1x165, 3x55, 5x33, 11x15)
Determine the prime factorization of 8281
7x7x13x13
A crate contains 11 boxes. Each box contains 11 packages. Each package contains 11 crayons. Express the number in a crate as a power and calculate
113 = 1331
Write 123, 126 in scientific notation. Round to the third place value
1.23 x 10 5
What is the definition of a prime number? Give an example of a prime number?
a number that has only two factors, 1 and
itself
How do you calculate the Greatest Common Factor? Give an example.
1) List all the factors for the two numbers
2) Look to see which numbers they have in common
3) The greatest common factor is the biggest number that both number share
Explain how you figure out the square root of a number by using mental math
1) Using prior multiplication knowledge, think of what number can be multiplied by itself to give you the actual number or close to the number you are finding the square root for
Evaluate the expression:
6 + square root1225+(3+2x3)3
770