For the sequence provided below, determine the incorrect term:
2, 4, 7, 13, 19, 30, 43
Correct Answer :
13
Solution :
The correct answer is Option 13 (or 13).
Step-by-step Explanation:
Let us analyze the given sequence to find the pattern governing the terms:
Let us check the differences between consecutive terms:
4 - 2 = 2
7 - 4 = 3
19 - 13 = 6
30 - 19 = 11
43 - 30 = 13
Now, let us examine the differences between the terms when we replace 13 with the correct term that fits the pattern of differences:
Notice the differences between terms: 2, 3, 5, 7, 11, 13 (which is the sequence of prime numbers).
Let us verify this prime number difference pattern starting from the first term 2:
First term = 2
Second term = 2 + 2 = 4
Third term = 4 + 3 = 7
Fourth term = 7 + 5 = 12
Fifth term = 12 + 7 = 19
Sixth term = 19 + 11 = 30
Seventh term = 30 + 13 = 43
Therefore, the fourth term in the given sequence should be 12 instead of 13.
Hence, the incorrect term in the sequence is 13.
Access expert-curated educational resources and study materials—completely free.
Create, conduct, and manage professional online assessments with Mindyard. Perfect for teachers and institutes.
Copyright © 2026 Mindyard. All Rights Reserved.