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Progression and Sequence question bank (Quantitative Aptitude)

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Q1.

The sixth term of an $A.P.$ is equal to $2$. The value of the common difference $x$ of the $A.P.$ which makes the product $a_1 a_4 a_5$ least is given by:

(A)
$x = \frac{8}{5}$
(B)
$x = \frac{5}{4}$
(C)
$x = \frac{2}{3}$
(D)
None of these
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Q2.

The interior angles of a polygon are in $A.P.$ If the smallest angle is $120^{\circ}$ and the common difference is $5^{\circ}$,then the number of sides is

(A)
$8$
(B)
$10$
(C)
$9$
(D)
$6$
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