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Type the missing number in this sequence:\newline99, _\_, 1717, 2121, 2525

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Full solution

Q. Type the missing number in this sequence:\newline99, _\_, 1717, 2121, 2525
  1. Identify Pattern: First, let's try to identify a pattern in the given sequence. We can do this by looking at the differences between the numbers that are given. Since we have a missing number, we will start by finding the difference between the numbers after the missing one.\newlineCalculation: 21−17=421 - 17 = 4, 25−21=425 - 21 = 4
  2. Calculate Differences: From the above step, we can see that the difference between each pair of consecutive numbers provided is 44. This suggests that the sequence is an arithmetic sequence with a common difference of 44.
  3. Find Missing Number: To find the missing number, we can subtract the common difference from the number after it in the sequence.\newlineCalculation: 17−4=1317 - 4 = 13

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