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How could you adapt the rule for division by 3 to decide easily when a number is divisible by 9?
Just add up the digits and if that sum is divisible by 9 then the original number is divisible by 9. Example 729 = 7+2+9 = 18 (18 is divisible by 9 therefore 729 is divisible by 9) 123456789 = 1+2+3+4+5+6+7+8+9 = 45 (45 is divisible by 9 therefore 123456789 is divisible by 9)
Is 729 divisible by3?
Since the sum, 18, of the digits of 729 is divisible by 3, 18 = 3 x 6, then 729 is divisible by 3.
Is 729 divisible by 2?
No.
Cube of 9?
It is 9*9*9 = 729
What is 6561 divided by 9?
729
Is 729 divisible by 9 or 8?
729 is divisible evenly by 9, but not evenly by 8, quotient is 91, remainder is 1
What is 729 by?
729 is divisible by 1, 3, 9, 27, 81, 243, 729.
Is 729 divisible by 8 and 9?
No.
How do you know that 729 is not a prime number?
It is divisible by 9.
How could you adapt the rule for division by 3 to decide easily when a number is divisible by 9?
Just add up the digits and if that sum is divisible by 9 then the original number is divisible by 9. Example 729 = 7+2+9 = 18 (18 is divisible by 9 therefore 729 is divisible by 9) 123456789 = 1+2+3+4+5+6+7+8+9 = 45 (45 is divisible by 9 therefore 123456789 is divisible by 9)
What is divisible by 729?
Multiples of 729.
Is 729 divisible by3?
Since the sum, 18, of the digits of 729 is divisible by 3, 18 = 3 x 6, then 729 is divisible by 3.
Is 729 divisible by 2?
No.
Is 729 divisible by 6?
yes!
What is the cube root of 729?
Answer: -9 -9 * -9 = 81 81 * -9 = -729
Cube of 9?
It is 9*9*9 = 729
What is 9 to the third power?
93=9*9*9. 9*9 is 81, and 81*9 is 729. 93=729.
