Quantitative Aptitude - Arithmetic Ability Questions

The average of 100 observations was calculated as 35.It was found later, that one of the observation was misread as 83 instead of 53. The correct average is :

If cos2x + cos4x = 1, then tan2x + tan4x =

Find the curved surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.

Find the odd word/letters/number pair from the given alternatives

Find the odd word/letters/number from the given alternatives.

Find out 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.

The sum of the digits of a 2­digit number is 17. If we add 9 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.