GCF/LCM

GCF

100

This number is the GCF between 49 and 42.

What is 7?

200

This number is the GCF between 60 and 84.

What is 12?

300

This number is the GCF between 120 and 144.

What is 24?

400

This number is the GCF between 308 and 504.

What is 28?

500

This number is the GCF between 1080 and 450.

What is 90?

LCM

100

This number is the LCM between 6 and 10.

What is 30?

200

This number is the LCM between 12 and 15.

What is 60?

300

This number is the LCM between 24 and 36.

What is 72?

400

This number is the LCM between 72 and 114.

What is 1368?

500

This number is the LCM between 95 and 222.

What is 21 090?

Divisibility Rules

100

This is the divisibility rule for 2.

What is 'the number must be even'?

200

This is the divisibility rule for 3.

What is the sum of the digits must be divisible by 3?

300

This is the divisibility rule for 5.

What is the last digit is either a 5 or a 0?

400

This is the divisibility rule for 6.

What is the number must be divisible by 2 and 3?

500

This is the divisibility rule for 9.

What is the sum of the digits must be divisible by 9?

Prime Factorization

100

This is the prime factorization for 64.

What is 2 x 2 x 2 x 2 x 2 x 2?

200

This is the prime factorization for 156.

What is 2 x 2 x 3 x 13?

300

This is the prime factorization for 234.

What is 2 x 3 x 3 x 13?

400

This is the prime factorization for 854.

What is 2 x 7 x 61?

500

This is the prime factorization for 987.

What is 3 x 7 x 47?

Squares and Square Root

100

The product of 3² x 3².

What is 81?

200

The square root of 144.

What is 12?

300

The square root of 134 will fall between these 2 whole numbers.

What are 11 and 12?

400

2^{2 +} 3² + 4² + 5²

What is 54?

500

√ (9² - √49 + 5² + 1)

What is 10?