Q. Type the missing number in this sequence:5, 7, 11, _, 25, 35, 47, 61
Identify Pattern:5,7,11,____,25,35,47,61Identify the pattern in the sequence.We need to observe the differences between consecutive terms to see if there is a consistent pattern.
Calculate Differences: Calculate the differences between consecutive terms that are given.7−5=211−7=4The differences are not consistent so far, so let's look at the next set of differences.25−11=1435−25=1047−35=1261−47=14The differences are not consistent, but they are increasing. We need to find the pattern in the differences.
Look for Patterns: Look for a pattern in the differences of the differences.4−2=214−4=1010−14=−412−10=214−12=2It seems that the differences of the differences are not consistent either. We need to look for another pattern.
Analyze Numbers: Analyze the sequence of given numbers to identify if they are special numbers, such as prime numbers.5 is a prime number.7 is a prime number.11 is a prime number.25 is not a prime number, but it is a square number (52).35 is not a prime number (5×7).47 is a prime number.61 is a prime number.It seems that most of the numbers are prime numbers, except for 25 and 35. Let's see if the missing number is a prime number.
Check Prime Numbers: Check the prime numbers between 11 and 25 to find the missing number.The prime numbers between 11 and 25 are 13, 17, 19, and 23.Since 25 is not a prime number, we can assume that the sequence is not strictly prime numbers. However, 25 is the square of 250, and 251 is the product of 250 and 253, which are both prime. Let's see if the missing number is related to prime numbers in a similar way.
Analyze Relationships: Analyze the relationship between the non-prime numbers and the prime numbers in the sequence. 25 is 5 squared, and 5 is the prime number before 7. 35 is the product of 5 and 7, which are consecutive prime numbers. The missing number should be related to the prime numbers before and after 11, which are 7 and 13.
Calculate Missing Number: Calculate the missing number based on the relationship between the non-prime numbers and the prime numbers.The missing number should be the product of 7 and 13, as 35 is the product of 5 and 7.7×13=91
Verify Solution: Verify if 91 fits the pattern in the sequence.91 is not a prime number, but it is the product of two consecutive prime numbers (7 and 13), similar to how 35 is the product of 5 and 7.The sequence seems to be a mix of prime numbers and products of consecutive prime numbers.