Prime
Is 2 a prime number?
Yes, it's only factors are 1 and itself. It is the only even prime number.
Is 4 composite?
Yes, it is divisible by 2. It has 3 factors: 1, 2, 4.
Is 2 even?
Yes, it is divisible by 2.
Is 4 odd?
No, it is divisible by 2.
What is the definition of a prime number?
A number that has exactly 2 factors. One and itself.
Is 35 prime?
No, it is divisible by 5.
Is 23 composite?
No, it is only divisible by 1 and 23.
Is 4,569 even?
No, the digit in the ones place is 9. 9 is not even so the entire number is not even.
Is 12,461 odd?
Yes, because it ends in 1.
What is the definition of a composite number?
A number with 3 or more factors.
Is 84 prime?
No, it is divisible by 2 because it is even.
Is 27 composite?
Yes, it is divisible by 3.
Even numbers all have __________ when put into groups of two.
partners
Odd numbers will have 1 ____________ when put into groups of two.
leftover
Is 1 prime or composite?
One is neither prime nor composite. It only has 1 factor.
Name all of the low prime numbers.
Which numbers group of numbers are always composite except for 2?
Even numbers, because they are all divisible by 2.
Which digits do all even numbers end in?
0, 2, 4, 6, 8
Which digits do all odd number end in?
1, 3, 5, 7, 9
Which list of numbers contains 1 even number and 2 odd numbers?
67, 65, 59
77, 78, 79
12, 14, 16
77, 78, 79
Which number from the list below is not prime?
15, 13, 19, 23, 17
15
Which number from the list below is not composite?
81, 82, 85, 88, 89
89, it's only factors are 1 and itself.
Which number from the list even?
2,177
1,345
9,990
9,990 because even numbers end in 0, 2, 4, 6, or 8.
Which number from the list is odd?
7,526
2,689
3,752
2,689, because it ends in 9.
Which list contains 1 prime number and 2 composite numbers?
86, 87, 88
77, 78, 79
55, 57, 58
77, 78, 79