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How many such 6s are there in the followrng number series, each of which is immediately preceded by 1 or 5 and immediately followed by 3 or 9 ? 26 3 7 5 6 4 2 9 6 1 3 4 1 6 3 9 1 5 6 9 2 3 1 6 5 4 3 2 1 9 6 7 1 6 3 |
Answer» SOLUTION : Such COMBINATIONS are :
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