Divisibility Rules for Numbers

The video tutorial explains how to determine if the number 135 is divisible by 2, 3, 5, or 6. It starts by checking divisibility by 2, noting that 135 is not divisible by 2 as it does not end in an even digit. Next, it checks divisibility by 3 by summing the digits, confirming that 135 is divisible by 3. The tutorial then verifies divisibility by 5, as 135 ends in 5. Finally, it checks divisibility by 6, concluding that 135 is not divisible by 6 since it is not divisible by 2.

What is the main problem discussed in the video?

• Checking if 135 is a prime number

• Checking if 135 is divisible by 2, 3, 5, or 6

• Finding the factors of 135

• Calculating the sum of digits of 135

Which digit should be in the ones place for a number to be divisible by 2?

• 1, 3, 5, 7, 9

• 0, 2, 4, 6, 8

• 1, 2, 3, 4, 5

• 2, 4, 6, 8, 10

Why is 135 not divisible by 2?

• It is less than 200

• It ends with a 5

• It is an odd number

• It is a prime number

Which of the following is NOT a rule for divisibility by 2?

• The number should end with 2

• The number should end with 0

• The number should end with 5

• The number should end with 8

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

• The number should be even

• The sum of its digits should be divisible by 3

• It should end with 0 or 5

• It should be a multiple of 6

What is the sum of the digits of 135?

• 8

• 9

• 11

• 10

Is 135 divisible by 3?

• Yes

• No

• Only if it is even

• Only if it ends with 5

What is the significance of the number 9 in checking divisibility by 3?

• It is a factor of 135

• It is the sum of the digits of 135

• It is the number of digits in 135

• It is the last digit of 135

What is the rule for a number to be divisible by 5?

• It should end with 0 or 5

• It should be a multiple of 10

• It should be even

• The sum of its digits should be divisible by 5

Why is 135 divisible by 5?

• It is a multiple of 10

• It ends with a 5

• The sum of its digits is 10

• It is an even number