7th
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Mathematics

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Daniela Rosario

4 years

Mathematics

7th

grade

Number Theory

Daniela Rosario

1K
plays

15 questions

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1. Multiple Choice
30 seconds
1 pt
The first six nonzero multiples of 7 are....
$7,\ 14,\ 28,\ 35,\ 42,\ 49\ \$
$7,\ 14,\ 21,\ 28,\ 35,\ 42\$
$14,\ 21,28,\ 35,\ 42,\ 49$
$1,\ 7,\ 14,\ 21,\ 28,\ 35\$
2. Multiple Choice
30 seconds
1 pt
Which of the following numbers is prime?
$39$
$108$
$98$

$79$
3. Multiple Choice
30 seconds
1 pt
The prime factorization of 104 is
$2+2+2+13$
$2\times2\times2\times13$
$2\times2\times1\times3$
$2\times2\times2\times3\times1$
4. Multiple Choice
30 seconds
1 pt
What number is represented by the prime factorization $2\times3\times3\times7?$
$120$
$1260$
$126$
$180$
5. Multiple Choice
30 seconds
1 pt
The GCF of 24 and 116 is
$3$
$29$
$8$

$4$
6. Multiple Choice
30 seconds
1 pt
The GCF of 72 and 90 is
$18$
$9$
$2$
$10$
7. Multiple Choice
30 seconds
1 pt
Use prime factorization tree to find the GCF of 285 and 525
$75$

$15$
$19$
$7$
8. Multiple Choice
30 seconds
1 pt
Use prime factorization tree to find the GCF of 63 and 189
$9$
$63$
$27$
$7$
9. Multiple Choice
30 seconds
1 pt
Which two of the following are relatively prime?
$16$
$54$
$27$
$105$
10. Multiple Choice
30 seconds
1 pt
The first eight nonzero multiples of 6 are
$6,\ 12,\ 18,\ 30,\ 36,\ 42,\ 48,\ 54\$
$0,\ 6,\ 12,\ 18,\ 24,\ 30\ 36,\ 42\$
$1,\ 6,\ 12,\ 18,\ 24,\ 30,\ 36,\ 42\$
$6,\ 12,\ 18,\ 24,\ 30,36,\ 42,\ 48$
11. Multiple Choice
30 seconds
1 pt
Find the LCM of 7 and 6 using the listing method
$42$
$6$
$14$
$21$
12. Multiple Choice
30 seconds
1 pt
Find the LCM of 4 and 12 using the listing method.
$24$
$48$
$12$
$36$
13. Multiple Choice
30 seconds
1 pt
Find the LCM of 28 and 98 using the prime factorization method.
$196$
$4$
$49$
$53$
14. Multiple Choice
30 seconds
1 pt
Find the LCM of 8, 27 and 72 using the factorization tree method.
$216$
$8$
$27$
$6$
15. Multiple Choice
30 seconds
1 pt
If two numbers are relatively prime, how do you find their least common multiple?
Divide them
Subtract them
Add them
Multiply them
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