Quantitative Aptitude - Arithmetic Ability Questions

A sum fetched a total simple interest of Rs. 7056 at the rate of 8 percent per year in 7 years. What is the sum?

If a boat goes upstream at a speed of 21 km/h and comes back the same distance at 28 km/h. What is the average speed (in km/hr) for the total journey?

In a match, average of runs scored by 7 players is 53. If the runs scored by 6 players are 121, 40, 26, 56, 37 and 48, then how many runs did the 7th player scored?

Of the four numbers whose average is 91, the first is 3/10 times the sum of other three. The first number is:

What is the length of the arc whose central angle is 30° and radius of the circle is 21 cm?

In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and AE are 8 cm, 4 cm and 12 cm respectively, what is the length of AC?

cot3A is equal to

A discount series of 15%, 20% and 25% is equal to the single discount of?