Quantitative Aptitude - Arithmetic Ability Questions

If a – (1/a) = b, b – (1/b) = c and c – (1/c) = a, then what is the value of (1/ab) + (1/bc) + (1/ca)?

If 15% of x is three times of 10% of y, then x:y = 

Selling price of an article is Rs 1144. If loss percentage is 12%, then what is the cost price (in Rs) of article?

Five women can do a work in 36 days. If the ratio between the capacity of a man and a woman is 3:1, then find how many days it will take 5 men to complete the same woek?

Length of two trains are 150 m and 200 m respectively and the ratio (shorter: longer) of their speed is 2 : 5. If they cross each other in opposite direction in 15 second then in what time faster train will overtake the slower train.

If 13A = 11B = 8C, find A : B : C

If l + m + n = 9 and l2+m2+n2 = 31, then the value of lm + mn + nl will be

25% discount is offered on an item. By applying a promo code the customer wins 4% cash back. What is the effective discount?