KCET · Maths · Mathematical Reasoning
Which of the following is not a group with respect to the given operation?
- A The set of even integers under addition
- B The set, of odd integers under addition
- C \(\{0\}\) under addition
- D \(\{1,-1\}\) under multiplication
Answer & Solution
Correct Answer
(B) The set, of odd integers under addition
Step-by-step Solution
Detailed explanation
The set of odd integers under addition is not a group. Since, under addition 0 is identity element which is not an odd number.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Maths
- The vectors \(\mathbf{A B}=3 \hat{\mathbf{i}}+4 \hat{\mathbf{k}}\) and \(\mathbf{A C}=5 \hat{\mathbf{i}}-2 \hat{\mathbf{j}}+4 \hat{\mathbf{k}}\) are the sides of a \(\triangle A B C\), The length of the median through \(A\) isKCET 2024 Easy
- The value of \(\cot ^{-1}\left[\frac{\sqrt{1-\sin x}+\sqrt{1+\sin x}}{\sqrt{1-\sin x}-\sqrt{1+\sin x}}\right]\), where \(x \in\left(0, \frac{\pi}{4}\right)\) isKCET 2023 Hard
- The function \(f(x)=|x-2|+x\) isKCET 2010 Medium
- If lines represented by \(x+3 y-6=0\), \(2 x+y-4=0\) and \(k x-3 y+1=0\) are concurrent, then the value of \(k\) isKCET 2011 Easy
- Match the following:
In the following, \([\mathrm{x}]\) denotes the greatest integer less than or equal to x .
\begin{array}{|l|l|l|l|}\hline & \text{Column - I} & & \text{Column - II} \\\hline \text{a}. & \mathrm{x}|\mathrm{x}| & \text{(i)} & \text {continuous in (-1, 1)} \\\hline \text{b.} & \sqrt{|\mathrm{x}|} & \text{(ii)} & \text{differentiable in (-1, 1)} \\\hline \text{c.} & \mathrm{x}+[\mathrm{x}] & \text{(iii)} & \text{strictly increasing in (-1, 1)} \\\hline \text{d.} & |\mathrm{x}-1|+|\mathrm{x}+1| & \text{(iv)} & \text{not differentiable at, at least one point in (-1, 1)} \\\hline\end{array}KCET 2025 Medium - A student has to answer 10 questions, choosing at least 4 from each of the parts \(A\) and \(B\). If there are 6 questions in part \(A\) and 7 in part \(B\), then the number of ways can the student choose 10 questions isKCET 2021 Easy
More PYQs from KCET
- If direction cosines of a vector of magnitude 3 are \(\frac{2}{3},-\frac{1}{3}, \frac{2}{3}\) and \(a>0\), then vector isKCET 2015 Easy
- If
\(x-1 \quad\) is
\(x^{5}-4 x^{3}+2 x^{2}-3 x+k=0\), then \(k\) is
\(a\)KCET 2012 Medium - Statement-I: Nitrogen in pyridine cannot be estimated by Kjeldahl's method.
Statement-II: Nitrogen in pyridine changes to ammonium sulphate when heated with conc. \(\text{H}_2\text{SO}_4\) in Kjeldahl's method.
Read the above given statements and choose the correct answer from the given options.KCET 2026 Medium - Two fixed charges A and B of \(5 \mu \mathrm{C}\) each are separated by a distance of \(6 \mathrm{~m}\). \(\mathrm{C}\) is the mid point of the line joining \(A\) and \(B\). A charge \(Q\) of \(-5 \mu \mathrm{C}\) is shot perpendicular to the line joining A and \(B\) through \(C\) with a kinetic energy of \(0.06 \mathrm{~J}\). The charge \(\mathrm{Q}\) comes to rest at a point D. The distance \(C D\) isKCET 2012 Hard
- A random variable \(X\) has the following probability distribution:

If the mean of the random variable \(X\) is \(1 / 3\), then the variance isKCET 2024 Medium - Lucas test is associated withKCET 2009 Medium