Class 11

Set Theory question bank (Maths)

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Q1.

If ${N_a} = \{an : n \in N\}$,then ${N_5} \cap {N_7} =$

(A)
${N_7}$
(B)
$N$
(C)
${N_{35}}$
(D)
${N_5}$
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Q2.

If $aN = \{ ax : x \in N \}$,then the set $3N \cap 7N$ is .....$N$.

(A)
$21N$
(B)
$10N$
(C)
$4N$
(D)
None of these
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