Recognize 11's
Without using the calculator or divisibility rule for 11, can you point out a multiple(s) of 11 by means of evaluating the number or just recognizing it? How many of them are multiples of 11? Answer it within a half of a minute. \italics\bold\array(121, 385,143,1331, 891, 793, 1067, 925)
The answer is 5.
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