Prime Numbers, Composite Numbers and Divisibility - One Line Questions
1.
Which prime number is an even number? —
2
2.
Which of the following is the smallest prime number? —
2
3.
Which of the following is the smallest composite number? —
4
4.
The divisibility rule for 10 states that a number is divisible by 10 if its last digit is: —
0
5.
What is the smallest odd prime number? —
3
6.
A number is divisible by 5 if its last digit is 0 or: —
5
7.
What is the sum of the digits of the number 345? —
12
8.
Which number is divisible by both 2 and 3? —
12
9.
Which of the following numbers is divisible by 11? —
121
10.
Which of the following numbers is divisible by 5? —
780
11.
Which of the following numbers is divisible by 4? —
456
12.
Which of the following numbers is divisible by 9? —
9018
13.
Which of the following numbers is divisible by 8? (A number is divisible by 8 if the number formed by its last three digits is divisible by 8) —
9016
14.
Which of the following numbers is divisible by 2? —
22
15.
Which of the following is a composite number? —
21
16.
Which of the following numbers is divisible by 7? —
14
17.
A number is divisible by 3 if the sum of its digits is divisible by: —
3
18.
Which of the following is NOT a prime number? —
9
19.
A number is divisible by 12 if it is divisible by both 3 and: —
4
20.
A number is divisible by 7 if doubling the last digit and subtracting it from the remaining number results in a number divisible by: —
7
21.
The prime factorization of 30 is: —
2 x 3 x 5
22.
The prime factorization of 42 is: —
2 x 3 x 7
23.
What is the prime factorization of 12? —
2 x 2 x 3
24.
The sum of the digits of 789 is: —
21
25.
Which of the following is a composite number? —
33
26.
Which of the following numbers is divisible by 11? (Alternating sum of digits) —
5678
27.
A number is divisible by 6 if it is divisible by both 2 and: —
3
28.
A number is divisible by 11 if the difference between the sum of digits at odd places and the sum of digits at even places is divisible by: —
11
29.
Which of the following is NOT a divisor of 24? —
5
30.
A number is divisible by 9 if the sum of its digits is divisible by: —
9
31.
Which of the following numbers is a prime number? —
11
32.
Which of the following is NOT a divisor of 36? —
7
33.
Which of the following is the largest prime number less than 50? —
47
34.
Which of the following is a prime number? —
53
35.
What is the prime factorization of 56? —
2 x 2 x 2 x 7
36.
If a number is divisible by 3 and 5, it is also divisible by: —
15
37.
Which of the following is a prime number? —
97
38.
The number 2 is: —
An even prime
39.
A number that has exactly two distinct positive divisors, 1 and itself, is called a: —
Prime number
40.
The number 17 is a: —
Prime number
41.
The number 37 is a: —
Prime number
42.
The number 1 is neither a prime number nor a: —
Composite number
43.
A number that is divisible by 2 is called an: —
Even number
44.
If a number leaves a remainder of 0 when divided by another number, it is said to be: —
Divisible
45.
The number 1 is: —
Neither prime nor composite
46.
A number that has more than two positive divisors is called a: —
Composite number
47.
The number 25 is a: —
Composite number
48.
The number 100 is a: —
Composite number
49.
The number 64 is a: —
Composite number
50.
A factor of a number is a number that divides it without leaving a: —
Remainder