A sum of money at double the rate of simple interest doubles itself in 10 years. In how much time will that amount be triple of itself?

What will be come in place of question mark(?) in the following number series?
14, 8, 7 , 11.5, 22, ?

Three of the following four words are alike in a certain way and one is different. Pick the odd word out.

The average weight of 15 students of a class increases by 1.5 kg when a student of 40 kg is replaced by a new student. What is the weight (in kg) of the new student?

The smallest number that must be subtracted from 1000 to make the resulting number a perfect square is 

Abdul prepared 42 litres of medicine and filled it in bottles of 280 ml each. Find how many bottle would be required?

Directions: The following bar graph shows the percentage breakup of a Sunil’s salary from year 2012 to 2016. With the given information, find the following questions.

If the ratio on saving in the year 2013 and 2016 are in the ratio 3 : 5. Then what is the ratio of EMI expenses in the year 2013 and 2016.

A boat moves downstream at the rate of 1 km in $$7{1\over 2}$$ minutes and upstream at the rate of 5 km an hour. What is the speed of the boat in the still water?