Periodical Exam Reviewer_MCAS_1st Trimester

When a number is divisible by another number, what is the remainder?

• 1

• number itself

• undefined

• 0

What does the divisibility rule for 9 states?

• If the number is even, then it is divisible by 9.

• If the last digit of the number is 0 or 5, then it is divisible by 9.

• If the sum of the digits is divisible by 9, then it is divisible by 9.

• If the number formed by the last two digits is divisible by 9, then the entire

           number is divisible by 9.

A student claims that the numeral 4 782 is divisible by 3 because the sum of its digits is 21, which is a multiple of 3. Another student argues that this is not a valid reason. Which of the following statements best supports the second student's argument?

• 4 782 is divisible by 3 because the sum of its digits is 21, which is a multiple of 3.

• 4 782 is not divisible by 3 because the sum of its even-positioned digits is 10, which is not divisible by 3.

• 4 782 is not divisible by 3 because the sum of its odd-positioned digits is 12, which is not divisible by 3.

• 4 782 is divisible by 3 because the sum of its digits is 21, and any number whose digits add up to 21 is always divisible by 3.

What does the term "Least Common Multiple" refer to in a set of numbers?

• The largest number in the set.

• The sum of all the numbers in the set.

• The product of all the numbers in the set.

• The smallest number that is a multiple of each number in the set.

Consider the numbers 84 and 126. Which of the following methods represents the most effective approach to finding their Greatest Common Factor (GCF)?

• Add the two numbers and divide the sum by 2.

• Identifying the smallest common prime factor of the given numbers.

• Subtract the smaller number from the larger number until the two numbers become equal.

• List down the factors of each number and determine the largest common factor from the list.

Find the Least Common Multiple (LCM) of 15 and 25.

• 15

• 25

• 75

• 50

All of these are multiples of 2, 4, and 8, except ______.

• 24

• 8

• 12

• 16

What is a factor or a number being multiplied by itself?

• exponent

• base

• multiple

• addends

What operation will we use first in the expression 9 + 5 × 2 - 4 ÷ 2?

• adddtion

• multiplication

• subtraction

• division

What is the exponent of natural numbers?

• 1

• 0

• undefined

• number itself