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What else can I help you with?
How can you tell whether a number is divisible by 3?
If the sum of its' digits are divisible by 3 for all numbers greater than 9.
Are all odd numbers greater than 30 are divisible by 3?
U={whole number greater than 10 but smaller than 30 } X={numbers divisible by 3 } Y Odd numbers
What two digit numbers are greater than 80 and divisible by 2 and 3?
Three of them.
What are numbers divisible by 3 and 4 up to 20?
There is only one number that can be divisible by both 3 and 4 yet not greater than 20, 12.
Why are not all odd numbers greater than 3 are prime numbers?
Because many of them are divisible by smaller odd numbers. For example 35 is divisible by 5 and so 35 cannot be a prime number.
How can you tell whether a number is divisible by 3?
If the sum of its' digits are divisible by 3 for all numbers greater than 9.
Are all odd numbers greater than 30 are divisible by 3?
U={whole number greater than 10 but smaller than 30 } X={numbers divisible by 3 } Y Odd numbers
First multiple of three greater than 400 expain how you know?
402. It is the first number after 400 for which the digital root (the sum of its digits) is divisible by 3. The digital root being divisible by 3 is a test for divisibility by 3.
What two digit numbers greater than 74 are divisible by 2 and 3?
78,84,90,96
What two digit numbers are greater than 80 and divisible by 2 and 3?
Three of them.
What are numbers divisible by 3 and 4 up to 20?
There is only one number that can be divisible by both 3 and 4 yet not greater than 20, 12.
How many numbers between 1 and 400 divisible by 3 or 7?
7x3 = 21 All numbers from 1-400 (399 total) that are factors of 21: 399/21 = 19
Why are not all odd numbers greater than 3 are prime numbers?
Because many of them are divisible by smaller odd numbers. For example 35 is divisible by 5 and so 35 cannot be a prime number.
Are all numbers divisible by 3 also by 9 give example?
All numbers divisible by 3 are NOT divisible by 9. As an example, 6, which is divisible by 3, is not divisible by 9. However, all numbers divisible by 9 are also divisible by 3 because 9 is divisible by 3.
Are all numbers that are divisible by 9 divisible by 3?
Yes; all numbers that are divisible by 9 are divisible by 3.
What is a greater number than 6 but divisible by 3?
9 is greater than 6 and divisible by 3.
What counterexample to the statement all odd numbers are divisible be 3?
5, 7, a bunch of numbers that are odd are not divisible by 3. numbers that are divisible by three can have all their numbers added together and come out with a number that is divisible by 3.
