Question

Find the missing number: 71, 55, 41, 29, ?, 11

• A. 19
• B. 21
• C. 25
• D. 23

Hint:

When solving number sequences, check for arithmetic patterns such as consistent differences between consecutive terms.

Answer 1

The Correct Option is A

Step 1: Identifying the pattern.
The given sequence is: 71, 55, 41, 29, ?, 11. Step 2: Checking the differences between consecutive numbers.
71 - 55 = 16
55 - 41 = 14
41 - 29 = 12
We observe that the differences decrease by 2 each time. Step 3: Continuing the pattern.
29 - 10 = 19 (Difference of 10)
19 - 8 = 11 (Difference of 8)
Step 4: Conclusion.
Thus, the missing number is 19, making option (1) correct.