0
I am thinking of a three digit number If you subtract 5 from it the result is divisible by 5 if you subtract 6 from it the result is divisible by 6 if you subtract 7 the result is divisible by 7 what?
Wiki User
∙ 12y ago
5 x 6 x 7 = 210. 210 is the answer.
proof
210 - 5 = 205/5 = 41
210 - 6 = 204/6 = 34
210 - 7 = 203/7 = 29
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Divisibility rule for 17?
Subtract 5 times the last digit from remaining truncated number. Repeat the step as necessary. If the result is divisible by 17, the original number is also divisible by 17
What is the divisibility rule for 91?
The number must meet two criteria:Take the original number excluding its last digit and subtract two times the last digit from it. The result must be divisible by 7.Take the original number excluding its last digit and subtract nine times the last digit from it. The result must be divisible by 13.In both cases, you can repeat the "truncate-and-subtract multiple" stage several times, if required.
How do you know if a number is divisible by 7?
Divide the number by seven. It is divisible by seven if the result is a whole number How do you know if a number is divisible by 7.? Ans: To know the given is divisible by an number or not. Take the number which is in the units place and double it. Then by eliminating the units number, subtract the number doubled by the remaining number. Continue this process until two digits number. 1) example: Take the number 5523. The number in the units place is 3. Double that number then we get 6. Subtract it from the number leaving the units place number then it becomes 552- 6 = 546. Again double the units place number 6 that is 12. Again subtract in from the number leaving units place number that is 54-12 = 42. The 42 is divisible by 7.( 6x7=42). The the number 5523 is divisible by 7 . 2) example: Take the number 38661. Double the number in the units place 1 then it becomes 2. Subtract in from 3866 then it becomes 3864. Double the number in the units place number 4, it becomes 8. Subtract it from 386. Then it becomes 378. Double the unit place number 8 it becomes 16. Subtract it from 37. Then it becomes 21. 21 is divisible by 7. So the number 38661 is also divisible 7. 3) Example: Take the number 38662. Double the number in the units place 2, then it becomes 4. Subtract the 4 from 3866, then it becomes 3862. Double the number in the units place number 2, then it becomes 4. Subtract this 4 from 386. Then it becomes 382. Again double the number in the units place it becomes 4, Subtract it from 38 , then it becomes 36. The 36 is not divisible by 7, so the number given is also not divisible by 7. Gadde Mathew Madhukar. ( From the book " Ganitha Medhavulu and Ganitha Chitkalu by Sri S. Chandra Sekhara Sastry, Pallavi Publications, Eluru Road, Vijayawada, Andhra Pradesh, India.
Is 5278 divisible by3?
Add up the digits---5+2+7+8 22 which is NOT a multiple of 3 so it is NOT divisible by 3. == Here is a list of the divisibility rules: 2 If the last digit is even, the number is divisible by 2. 3 If the sum of the digits is divisible by 3, the number is also. 4 If the last two digits form a number divisible by 4, the number is also. 5 If the last digit is a 5 or a 0, the number is divisible by 5. 6 If the number is divisible by both 3 and 2, it is also divisible by 6. 7Take the last digit, double it, and subtract it from the rest of the number;if the answer is divisible by 7 (including 0), then the number is also. 8If the last three digits form a number divisible by 8,then so is the whole number. 9 If the sum of the digits is divisible by 9, the number is also. 10 If the number ends in 0, it is divisible by 10. 11 Alternately add and subtract the digits from left to right. (You can think of the first digit as being 'added' to zero.)If the result (including 0) is divisible by 11, the number is also.Example: to see whether 365167484 is divisible by 11, start by subtracting:[0+]3-6+5-1+6-7+4-8+4 = 0; therefore 365167484 is divisible by 11. 12 If the number is divisible by both 3 and 4, it is also divisible by 12. 13Delete the last digit from the number, then subtract 9 times the deleteddigit from the remaining number. If what is left is divisible by 13,then so is the original number
What is the divisibility test for 7?
You can determine if a number is divisible by 7 by using the following method: E.g. 161 - Double the last digit (2 x 1 = 2) Subtract 2 from the number formed by the the remaining digits in this case, 16 -2 = 14 If the result is divisible by 7 (14 /7 =2); then the original number is divisible by 7. 161 / 7 = 23
How do you know when 7 is a factor of a number?
Double the last digit, subtract it from the rest. If the result is divisible by 7, the whole number is divisible by 7.
Divisibility rule for 17?
Subtract 5 times the last digit from remaining truncated number. Repeat the step as necessary. If the result is divisible by 17, the original number is also divisible by 17
What is the divisibility rule for 91?
The number must meet two criteria:Take the original number excluding its last digit and subtract two times the last digit from it. The result must be divisible by 7.Take the original number excluding its last digit and subtract nine times the last digit from it. The result must be divisible by 13.In both cases, you can repeat the "truncate-and-subtract multiple" stage several times, if required.
What is the dvisibility rule for 7?
To find out if a number is divisible by seven, take the last digit, double it, and subtract it from the remaining digits of the number.If the result is divisible by 7 (including zero), then the original number is divisible by seven. If the new number is still too big, you can apply the rule again.Example: 406.First, double the last digit, 6. (6 times 2 equals 12.)Second, subtract that number from the remaining digits. (12 subtracted from 40 equals 28.)Third, if the result is divisible by seven, the whole number is. (7 divides equally into 28.)Thus, since the result is divisible by seven, we can conclude that 406 is divisible by seven.If the result is still to big, repeat this procedure.Example: 7,805.Double the last digit, (makes 10,) subtract it from remaining digits, (780 minus 10 equals 770.)770 is still to big a number to easily determine whether it is divisible by seven, so it is best to repeat the procedure, like so:Double the last digit, which is a little weird since the last digit is zero, but 0 plus 0 still equals zero. (0 times 2 equals zero.) Subtract from remaining digits, (77 minus 0 equals 77.)77 is divisible by 7, so we can conclude that 7,805 is divisible by seven.
How do i subtract 110-150?
The answer to the problem is -40. When you subtract a larger number from a smaller number, the result is a negative number.
How do you know if a number is divisible by 7?
Divide the number by seven. It is divisible by seven if the result is a whole number How do you know if a number is divisible by 7.? Ans: To know the given is divisible by an number or not. Take the number which is in the units place and double it. Then by eliminating the units number, subtract the number doubled by the remaining number. Continue this process until two digits number. 1) example: Take the number 5523. The number in the units place is 3. Double that number then we get 6. Subtract it from the number leaving the units place number then it becomes 552- 6 = 546. Again double the units place number 6 that is 12. Again subtract in from the number leaving units place number that is 54-12 = 42. The 42 is divisible by 7.( 6x7=42). The the number 5523 is divisible by 7 . 2) example: Take the number 38661. Double the number in the units place 1 then it becomes 2. Subtract in from 3866 then it becomes 3864. Double the number in the units place number 4, it becomes 8. Subtract it from 386. Then it becomes 378. Double the unit place number 8 it becomes 16. Subtract it from 37. Then it becomes 21. 21 is divisible by 7. So the number 38661 is also divisible 7. 3) Example: Take the number 38662. Double the number in the units place 2, then it becomes 4. Subtract the 4 from 3866, then it becomes 3862. Double the number in the units place number 2, then it becomes 4. Subtract this 4 from 386. Then it becomes 382. Again double the number in the units place it becomes 4, Subtract it from 38 , then it becomes 36. The 36 is not divisible by 7, so the number given is also not divisible by 7. Gadde Mathew Madhukar. ( From the book " Ganitha Medhavulu and Ganitha Chitkalu by Sri S. Chandra Sekhara Sastry, Pallavi Publications, Eluru Road, Vijayawada, Andhra Pradesh, India.
What is the rule of division for 7?
Double the last digit. Subtract it from the rest. If the result is divisible by 7, the original number is divisible by 7.
Is 5278 divisible by3?
Add up the digits---5+2+7+8 22 which is NOT a multiple of 3 so it is NOT divisible by 3. == Here is a list of the divisibility rules: 2 If the last digit is even, the number is divisible by 2. 3 If the sum of the digits is divisible by 3, the number is also. 4 If the last two digits form a number divisible by 4, the number is also. 5 If the last digit is a 5 or a 0, the number is divisible by 5. 6 If the number is divisible by both 3 and 2, it is also divisible by 6. 7Take the last digit, double it, and subtract it from the rest of the number;if the answer is divisible by 7 (including 0), then the number is also. 8If the last three digits form a number divisible by 8,then so is the whole number. 9 If the sum of the digits is divisible by 9, the number is also. 10 If the number ends in 0, it is divisible by 10. 11 Alternately add and subtract the digits from left to right. (You can think of the first digit as being 'added' to zero.)If the result (including 0) is divisible by 11, the number is also.Example: to see whether 365167484 is divisible by 11, start by subtracting:[0+]3-6+5-1+6-7+4-8+4 = 0; therefore 365167484 is divisible by 11. 12 If the number is divisible by both 3 and 4, it is also divisible by 12. 13Delete the last digit from the number, then subtract 9 times the deleteddigit from the remaining number. If what is left is divisible by 13,then so is the original number
What is the number theory for figurng out what is divisible by 7?
First of all, it is the one that is probably not even worth doing. It is honestly easier in most cases to just try it! To determine if a number is divisible by 7, take the last digit off the number, double it and subtract the doubled number from the remaining number. If the result is evenly divisible by 7 (e.g. 14, 7, 0, -7, etc.), then the number is divisible by seven. This may need to be repeated several times.
Does a negative number result when you subtract a larger number from a smaller number?
Yes
What happens when you subtract a number from its self?
The result will be 0.
When you subtract 7 from it the result is 11 what is the number?
18 is.
