Use divisibility tests to decide whether the first number is divisible by the second.
-139,243,105; 11 [Note that a divisibility test for 11 is as follows:
Starting at the left of the number, add together every other digit. Add together the remaining digits.
Subtract the smaller of the two sums from the larger. If the final number obtained is divisible by 11,
Then so is the original number. If the final number obtained is not divisible by 11, then neither is the
Original number.]
A)Yes
B)No

Question

Quizplus · Accepted Answer

Applying the divisibility test for 11: Sum of every other digit = 1 + 9 + 4 + 1 + 5 = 20. Sum of the remaining digits = 3 + 2 + 3 + 0 = 8. Subtracting the smaller sum from the larger gives 20 - 8 = 12, which is not divisible by 11. Therefore, 139,243,105 is not divisible by 11.

Use Divisibility Tests to Decide Whether the First Number Is