Find out the wrong number in the series : 1, 1, 2, 6, 24, 96, 720
Correct answer: C. 96
- A. 6
- B. 24
- C. 96
- D. 720
Explanation
The terms follow factorials: 1, 1, 2, 6, 24, 120, 720, so the sixth term should be 5! = 120, not 96. A student may choose 720 because it is the final term and appears after the incorrect 96, overlooking that 720 itself equals 6!.
Last updated
About Sequences and Series
Sequences describe ordered terms formed by a pattern, while series represent the sum of those terms. Questions cover arithmetic and geometric sequences, their nth terms, common difference or ratio, finite sums, and applications, with the sequence itself kept distinct from the corresponding series.
Practise Algebra
269 free Algebra MCQs from Mathematics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Mathematics questions like this
Mathematics is on 67 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.