Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd number pair from the given alternatives.

The price of an article is cut by 31%, to restore to its original value, the new price must be increased by

ΔDEF is right angled at E. If secD = 25/7, then what is the value of cosecF ?

What is the third proportional to 10 and 20?

A bank offers 5% compound interest per half year. A customer deposits Rs 4800 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest?

What is the equation of the line whose y-intercept is -3 and makes an angle of 45° with the positive x-axis?

Six year ago Parvez’s age was same as the present age of Manish. If the present age of Parvez is one-fourth more than that of Manish's present age, then in how many years will Parvez’s age become double of Manish’s present age?

In ΔABC, ∠BAC = 90° and AD is drawn perpendicular to BC. If BD = 7 cm and CD = 28 cm, then what is the length (in cm) of AD?