Quantitative Aptitude - Arithmetic Ability Questions

The surface area (in sq.cm.) of a sphere with radius 1 cm is :(pi = 22/7)

What is the measure of an interior angle of a regular dodecagon?

The total surface area of a hemisphere is 41.58 sq cm, find its radius.

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

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

n an alloy, lead and tin are in the ratio of 2 : 3. In the second alloy, the ratio of same elements is 3 : 4. If equal quantities of these two alloy are mixed to forma new alloy, then what will be the ratio of these two elements in the new alloy? 

If 2/3 of a pizza costs Rs.300, then 3/5 of a pizza will cost

In the following question, select the odd letter/letters from the given alternatives.