Quantitative Aptitude - Arithmetic Ability Questions

Four pairs of words are given. Find the odd one out.

If 5/6th of 7/6th of a number is 140, then 9/4th of that number is

The marked price of a pen is Rs 3000. The shopkeeper gives two successive discounts of 15% and a% to the customer. If the customer pays Rs 2142 for the pen, then what is the value (in percentage) of a?

A train crosses a 550 m long platform in 36 seconds. How long was the train if it was travelling at the speed of 70 kmph?

What is the ratio of simple interest earned on certain amount at the rate of 12% for 6 years and that for 12 years?

Present age of Amit is twice of Baman’s present age. After 5 years Baman’s age will be 4 times of the Chetan’s present age. If Chetan celebrated his sixth birthday 7 years ago, then what will be the present age (in years) of Amit?

The average cost of 5 items in a shopping list is Rs 650. If one more item whose cost is Rs 1400 is added to the list what will be the new average (in Rs)?

√(cosec2 -­ 1)/cosecA is equal to?