GATE CSE 2009 | Set Theory & Algebra Question 39 | Discrete Mathematics

GATE CSE 2009

MCQ (Single Correct Answer)

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For the compositive table of a cyclic group shown below GATE CSE 2009 Discrete Mathematics - Set Theory & Algebra Question 38 English

Which one of the following choices is correct?

a, b are generators

b, c are generators

c, d are generators

d, a are generators

GATE CSE 2007

MCQ (Single Correct Answer)

-0.6

A partial order P is defined on the set of natural numbers as following. Herw x/y denotes integer division.
i) (0, 0) $$ \in \,P$$.
ii) (a, b) $$ \in \,P$$ if and only a %
$$10\, \le $$ b % 10 and
)a/10, b/10) $$ \in \,P$$.

Consider the following ordered pairs:
$$\matrix{ {i)\,\,\,(101,\,22)} & {ii)\,\,\,(22,\,\,101)} \cr {iii)\,\,\,(145,\,\,265)} & {iv)\,\,\,(0,\,153)} \cr } $$
Which of these ordered pairs of natural numbers are comtained in P?

(i), (iii) and (iv)

(ii) and (iv)

(i) and (iv)

(iii) and (iv)

GATE CSE 2007

MCQ (Single Correct Answer)

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Consider the set of (column) vectors defined by $$X = \,\{ \,x\, \in \,{R^3}\,\left| {{x_1}\, + \,{x_2}\, + \,{x_3} = 0} \right.$$, where $${x^T} = \,{[{x_1}\, + \,{x_2}\, + \,{x_3}]^T}\} .$$ Which of the following is TRUE?

$$\left\{ {{{\left[ {1,\, - 1,\,0} \right]}^T},\,{{\left[ {1,\,\,0 ,- 1,\,} \right]}^T}} \right\}$$ is a basis for the subspace X.

$$\left\{ {{{\left[ {1,\, - 1,\,0} \right]}^T},\,{{\left[ {1,\,\,0,\, - 1,\,} \right]}^T}} \right\}$$ is a linearly independent set, but it does not span X and therefore is not a basis of X.

X is not a subspace of $${R^3}$$.

None of the above.

GATE CSE 2007

MCQ (Single Correct Answer)

-0.6

How many different non-isomorphic Abelian groups of order 4 are there?