Factors
What are the factors of 17?
1 and 17
There were some rabbits in a pen. Altogether I counted 56 feet. How many rabbits were in the pen?
14 rabbits
Give a definition of a prime number.
A number that has exactly two unique factors, 1 and itself. The numbers 2, 3 and 5 are some examples of prime numbers.
498 x 7
3,486
It is the smallest two-digit prime number.
2
How many factors does 28 have?
6
8 cars
Use three math terms you learned in this unit to describe the number 36.
even number
square number
multiple of 1, 2, 3, 4, 6, 8, 12, 18 and 36
factor of 36, 72, and so on
632 divided by 9
70 R2 OR 70 2/9
It is divisible by 10. The tens digit is equal to the number of legs on an insect.
60
Give an example of a number with exactly three different factors?
4, 9, 25, 49, 121, 169, 289, 361, 529, etc...
(any number that is a square of a prime number)
Pens cost $1.29 each. Use mental math to figure out how much it will cost to buy five pens.
$6.45
What do the words product, sum, quotient and difference have in common?
All terms describe the answer as a result of an operation (multiplication, addition, division, and subtraction).
DAILY DOUBLE !!!
What is the least common multiple of 4, 6, and 8?
24
It is odd. It is prime. The product of the digits is 15.
53
List the factors of 39.
1, 3, 13 and 39.
Diogenes has been collecting recycled cans for a charity drive. Each can is worth 5 cents. Diogenes has raised $2.35. How many more cans does he need to collect in order to have a donation of $5.00?
53 cans
What are the divisor and dividend, and how are they related?
The divisor is the number in a division problem that divides into another number, which is the dividend.
Explain how to multiply 299 times 4 in your head. Give the answer.
1,196
One strategy would be to round 299 to 300, then multiply 300 by 4 to get 1200. Since 300 - 299 = 1, you have 4 more than you need, so you must subtract 4 from 1200 to get 1196.
It is composite. The digits add up to 12. One of the factors is 13.
39
What is the greatest common factor of 24 and 18?
6
DAILY DOUBLE!!!
If hot dogs come in packages of eight and buns come in packages of 12, what is the minimum number of hot dog and bun packages needed so every bun has one hot dog?
3 packages of hot dogs and 2 packages of buns
Explain how a multiple and a factor are alike and different?
A multiple and factor both are terms used to describe multiplication relationships; a factor is a number that divides exactly into a given whole number and a multiple is a number that is the product of a given number and a whole number.
I'm thinking of the smallest number that when divided by 4 has a remainder of 3, but when divided by 5 has a remainder of 0. What is the number?
15
The sum of the digits is 9. It is odd. It is a square number.
81