Factors
Use factor rainbows to identify the factors 99.
1, 3, 9, 11, 33, 99
What is divisibility used for?
A way to determine whether one number is a factor of another number without actually dividing.
Order them by least to greatest.
0.122, 0.334, 0.682, 0.834, 0.929, 0.987, 0.774, 0.123, 0.292, 0.682
0.122, 0.123, 0.292, 0.334, 0.682, 0.682, 0.774, 0.834, 0.929, 0.987
The least common multiple is defined as the smallest multiple that two or more numbers have in common.
Define prime factorization.
"Prime Factorization" is finding which prime numbers multiply together to make the original number.
What is the divisibility rule for 2?
The last digit is 0, 2, 4, 6, or 8.
Round 3.817 to the nearest hundredth
3.820
Define common multiple.
A number that is a multiple of two or more given numbers.
Determine the prime factorization of 2055
2055 - 3 x 5 x 137
Is the number 2024 is divisible by 4?
As we know, a number is divisible by 4, if the last two digits of the given number are exactly divisible by 4. Therefore, 2024 is divisible by 4.
Is 187 a prime or composite number?
composite
16
Determine the missing number of this prime factorization. 8281= 7x7x13x?
13
What is the divisibility rule for 9?
A number is divisible by 9 if the sum of the digits is divisible by 9.
1107 is divisible by 9 because 1+1+0+7 = 9 and 9 ÷ 9 = 1.
Explain why there are no square prime numbers.
There are no square prime numbers because square numbers have at least three factors: 1, the square root, and the number itself.
In the opening hours of a new store, a bell rang every 2 minutes and a light flashed every 3 minutes. How many times did they happen at the same time in the first hour of opening?
LCM = 6 so they happen together every six minutes. 60 minutes in an hour so it will happen at the same time 10 times in the first hour.
The prime factorizations are shown:
25x3x52x710
38x5x7x4112Because 5 and 7 are factors of both.
Is 99992 divisible by 8?
According to the divisibility rule of 8, a number is divisible by 8 if the last three digits of a number are divisible by 8.
992 is divisible by 8.
Therefore, 99992 is divisible by 8.
The consecutive numbers 2 and 3 are both prime. How do you know that there are no other consecutive prime numbers?
2 is the only even prime number so no other ones can be consecutive.
You are making meat and cheese roll-ups for a party. Meat comes in a package of 10 slices and cheese comes in a package of 12 slices. How many packages of each should you buy if you won’t want leftovers?
LCM is 60 so you will make 60 rollups. You need 6 packs of meat and 5 packs of cheese.