Question

what is divisblity rule of seven

Answer 1

To check if a number is evenly divisible by 7: Take the last digit of the number, double it Then subtract the result from the rest of the number If the resulting number is evenlydivisible by 7, so is the original number.

Answer 2

Adding the last two digits to twice the rest gives a multiple of 7. (Works because 98 is divisible by 7.)483,595: 95 + (2 × 4835) = 9765: 65 + (2 × 97) = 259: 59 + (2 × 2) = 63.Multiply each digit (from right to left) by the digit in the corresponding position in this pattern (from left to right): 1, 3, 2, -1, -3, -2 (repeating for digits beyond the hundred-thousands place). Then sum the results.483,595: (4 × (-2)) + (8 × (-3)) + (3 × (-1)) + (5 × 2) + (9 × 3) + (5 × 1) = 7.Adding the last digit to 3 times the rest gives a multiple of 7. [7]224: 4 + (3 x 22) = 70Adding 3 times the last digit to 2 times the rest gives a multiple of 7. [7]245: (3 x 5) + (2 x 24) = 7 x 9 = 63