1st
Which of these numbers is prime?
29
39
85
51
29
Which number below is composite?
23
37
49
71
49
The number 64 is which type of number?
Square number
Triangular number
Prime number
Odd number
Square number
Which option lists only prime numbers?
2, 5, 11
4, 9, 15
6, 7, 12
3, 8, 13
2, 5, 11
Which number is a square number and also a multiple of 4?
12
9
16
25
16
Multiply the smallest prime number by the largest single‑digit prime number. Which option matches the product?
14
16
18
22
14
Which of these numbers is both a square and a triangular number?
2
9
16
36
36
Which number below has exactly three different prime factors?
30
35
49
27
30
What is the product of the prime numbers 3 and 11?
33
Which of these numbers is prime?
33
35
37
39
37
The prime factorization 2 × 3 × 3 × 5 equals which number?
90
What is the sum of first two prime numbers?
5
Add the first four triangular numbers. What is the sum?
20
What number is after 36 in the sequence of square numbers?
49
What is the 5th triangular number?
15
How many distinct factors does the number 12 have?
6
What is the next prime number after 43?
47
Which statement is true?
A. even numbers are composite except 2
B. All odd numbers are prime
C. Every square number is prime
D. 1 is a prime number
A. even numbers are composite except 2
Add the first prime number and the first composite number. What is the sum?
6
Which expression shows the prime factorization of 100?
2 × 2 × 5 × 5
4 × 25
10 × 10
2 × 50
2 × 2 × 5 × 5
I am a number less than 20. I am both a square number and an odd number. What number am I?
1 or 9
I am a number less than 10. Which number is both triangular and composite?
I am a triangular number between 10 and 20. What number am I?
15
Which number is both even and prime?
2
I have exactly 4 factors. One example is 6. Find another number between 10 and 20 like me.
14 or 15