Quantitative Aptitude - Arithmetic Ability Questions

A chord of a circle is equal to its radius. A tangent is drawn to the circle at an extremity of the chord. The angle between the tangent and the chord is

If the volumes of two right circular cones are in the ratio 1:4 and their diameters of bases in the ratio 4:5, then their heights will be in the ratio:

Aparna changes the marked price of an item to 50% above its C.P. What % of discount allowed in approximately to gain 10%?

Select the odd number from the given alternatives.

select the odd word/letters/number/number pair from the given alternatives.

The HCF of 20, 28 and 48 is

Select the odd word/letters/number/number pair from the given alternatives.

The radius of a hemisphere is 21 cm, what is its volume? (Take π = 22/7)