Question

How would you test weather 7 is a factor of 291?

Answer 1

The divisibility rule of 7 states that for a number to be divisible by 7, the last digit of the given number should be multiplied by 2 and then subtracted with the rest of the number leaving the last digit. If the difference is 0 or a multiple of 7, then it is divisible by 7. So 1x2 =2 and 29 -2 =27 not divisible by 7 and not 0 so this number is not divisible by 7

Answer 2

Divide by 7 to see if the result is a whole number.

Step-by-step explanation:

Divide 291 by 7 and see if the result is a whole number.

(291/7) = 41.57143 : No, 7 is not a factor of 291.