Q. Type the missing number in this sequence:1, _, 25, 125, 625, 3,125
Identify Pattern: Identify the pattern in the sequence.The sequence is 1, _, 25, 125, 625, 3,125. We need to determine if there is a common ratio or a common difference that can help us find the missing number.
Check Type: Check if the sequence is arithmetic or geometric.An arithmetic sequence has a common difference between terms, while a geometric sequence has a common ratio. By looking at the given numbers, we can see that each term seems to be a multiple of the previous term, suggesting a geometric sequence.
Calculate Ratio: Calculate the common ratio using the terms provided.We can use the terms 25 and 125 to find the common ratio. Divide 125 by 25 to get the common ratio.125/25=5Common Ratio: 5
Find Missing Number: Use the common ratio to find the missing number.If we divide 25 by the common ratio, we should get the missing number.Missing Number = 525Missing Number = 5
Verify Pattern: Verify the pattern with the next term.To ensure that 5 is the correct missing number, multiply it by the common ratio and check if the result is the next term in the sequence.5×5=25Since 25 is the next term in the sequence, our missing number is correct.
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