Quantitative Aptitude - Arithmetic Ability Questions

 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 aLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives

Findout the odd word/letters/number/number pair from the given alternatives.
7 : 50 : : 9 : ?

Select the odd word from the given alternatives.

Δ DEF is right angled at E. If m∠D = 45°, then what is the value of cosecF X cotD?

What is the area (in sq cm) of a rectangle if its diagonal is 51 cm and one of its sides is 24 cm?

The areas of two similar triangles ΔABC and ΔPQR are 121 sq cms and 64 sq cms respectively. If PQ = 12 cm, what is the length (in cm) of AB?

When a number is increased by 18, it becomes 106% of itself. What is the number?

Which of the following is not a quadratic equation?