Practice Ciphering Round 1

Practice Ciphering Round 1

Assessment

Flashcard

Mathematics

5th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the rule for a number to be divisible by 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3.

2.

FLASHCARD QUESTION

Front

In the number 3A6,792, what is the maximum value of A for divisibility by 3?

Back

The maximum value of A is 9, making the sum of the digits 36, which is divisible by 3.

3.

FLASHCARD QUESTION

Front

What are factors of a number?

Back

Factors are numbers that can be multiplied together to get the original number.

4.

FLASHCARD QUESTION

Front

How do you find the number of factors of a number?

Back

To find the number of factors, determine the prime factorization of the number and use the formula: (e1+1)(e2+1)...(en+1), where e1, e2,..., en are the exponents in the prime factorization.

5.

FLASHCARD QUESTION

Front

What is the prime factorization of 40?

Back

The prime factorization of 40 is 2^3 * 5^1.

6.

FLASHCARD QUESTION

Front

How many total factors does 40 have?

Back

40 has 8 factors: 1, 2, 4, 5, 8, 10, 20, and 40.

7.

FLASHCARD QUESTION

Front

What is a rate in mathematics?

Back

A rate is a ratio that compares two quantities with different units.

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