Quantitative Aptitude - Arithmetic Ability Questions

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

30% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?

What is the equation of the line which passes through the points (3,­2) and (5,3)?

A number is greater than 58 times its reciprocal by 3/4. What is the number?

Alarms from 3 different clocks sound after every 2, 4 and 6 hours, respectively. If the clocks are startedat the same 6 time, how many times do the alarms ring together in 3 days?

If a+b+c=15 and 1a+1b+1c=71abc, then the a3+b3+c3-3abc is

ABC is an equilateral triangle and P is the orthocenter of the triangle, then what is the value (in degrees) of ∠BPC?

Which of the following is not true for a rhombus?