Find the one which does not belong to that group ?
Correct answer: B. 121
- A. 343
- B. 121
- C. 1331
- D. 2197Downloading Digital Educational Resources
Explanation
343 = 7 x 7 x 7, 1331 = 11 x 11 x 11, and 2197 = 13 x 13 x 13, so these are perfect cubes. 121 = 11 x 11 is a perfect square rather than a cube, making it the odd one. A student may choose 343 because it is the smallest number, but size is not the relevant property.
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.