General Studies · Number Test
Count each '1' in the following sequence of numbers that is immediately followed by '2', provided that '2' is NOT immediately followed by '3'. How many such 1s are there in total? 1 2 1 3 4 5 1 2 3 5 2 1 2 6 1 4 5 1 1 2 4 1 2 3 2 1 7 5 2 1 2 5
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