quant flashcard notes: group 2

What is divisble by 0?

nothing is divisible by 0.

All integers are divisible by __________.

1. 
   

A number is divisible by 2 if it is __________.

an even integer.

A number is divisible by 3 if the __________ is divisible by 3.

sum of its digits.

To check if a number is divisible by 4, examine the __________.

last two digits.

A number is divisible by 5 if the last digit is __________ or __________.

0 or 5.

A number is divisible by 6 if it is divisible by both __________ and __________.

2 and 3.

A number is divisible by 9 if the __________ is divisible by 9.

sum of its digits.

The only even prime number is __________.

2

When you multiply prime numbers together and add 1, you create ______

a new prime number

How do you find the total number of x’s in 50!

Find how many times x goes into 50:

x = 5

5^1 = 10, 5² (25) = 2

10 + 2 = 12

Zero is unique because it is __________, __________, and a __________ of every integer.

neither positive nor negative; even; multiple.

The greatest common factor (GCF) of 720 and 1764 is __________.

36. 
    

The least common multiple (LCM) of 126 and 132 is __________.

2,772.

The last digit of any number raised to an exponent can be found by focusing on the __________.

last digits.

0 raised to any power equals __________.

1

1 raised to any power equals __________.

1