Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the missing number from the given series.1 108, 81, 54, 27, ?

The smallest number that must be subtracted from 2800 so that the obtained number is a perfect square is

The sum of two numbers is 25 and sum of their square is 313. Calculate the numbers.

Find the odd numbers/letters/numbers from the given alternatives.

In the following question, four number pairs are given. The number on left side of (–) is related to the number of 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.

Two numbers are in the ratio 4:5 and their HCF is 13. Their LCM is

3cosA is equal to

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?