What number should replace the question mark?
52, 25, 77, 77, ? , 451, 605
Answer:
154: reverse the previous number and add; for example 52 reversed is 25, and 52 + 25 = 77
52, 25, 77, 77, ? , 451, 605
Answer:
154: reverse the previous number and add; for example 52 reversed is 25, and 52 + 25 = 77
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