Quantitative Aptitude - Arithmetic Ability Questions

ΔABC is right angled at B. If cotA = 7/24, then what is the value of cosecC ?

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation.Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

If 1+121+141+161+181-131-151-17 = 1+ 1x, then what is the value of x?

The HCF of 20, 28 and 48 is

What is the reflection of the point (4, 7) in the line y = -1?

If x = (a/b) + (b/a), y = (b/c) + (c/b) and z = (c/a) + (a/c), then what is the value of xyz – x2 – y2 – z2?

If X = 423 + 32 then find the value of  ( X + 1X ).

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