Q. Type the missing number in this sequence:1, 5, 25, _, 625, 3,125
Identify Pattern: Identify the pattern in the sequence.The sequence is 1, 5, 25, _____, 625, 3,125. We need to determine if the sequence is arithmetic (each term is added by a constant) or geometric (each term is multiplied by a constant).Looking at the sequence, we can see that each term seems to be a multiple of the previous term, suggesting a geometric sequence.
Determine Common Ratio: Determine the common ratio of the geometric sequence.To find the common ratio, we can divide a term by its preceding term. Using the second and first term: 15=5.The common ratio appears to be 5.
Verify Ratio: Verify the common ratio with another pair of consecutive terms.Using the last two terms provided: 3,125/625=5.This confirms that the common ratio is indeed 5.
Find Missing Term: Use the common ratio to find the missing term.The term before the missing number is 25. To find the missing term, we multiply 25 by the common ratio of 5.25×5=125.The missing number in the sequence should be 125.
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