Ravi bought a camera and paid 18% less than its original price. He sold it at 30% profit on the price he had paid. How much was the profit percentage earned by Ravi on the original price?
A wholesaler purchases goods worth ₹25,000. The manufacturer offers a trade discount of 10% and an additional scheme discount of 5%. Calculate the net price of the goods after both discounts
A pipe can fill a tank in 6 hours. Another pipe can empty the filled tank in 30 hours. If both the pipes are opened simultaneously, then the time (in hours) in which the tank will be two-third filled, is
Pinky bought 25 books at the rate of ₹14 each, 40 pens at the rate of ₹7 each and 15 pencils at the rate of ₹6 each. Calculate the average price (in ₹) of all the stationery goods.
Two pipes A and C can fill a tank in 10 hours and 15 hours respectively. If A is open all the time and C is open for 30 minutes, then find the time needed for the tank to be filled.
A 120 m long train crosses a man walking at a speed of 8.5 km/h in the opposite direction in 12 seconds. What is the speed (in km/h) of the train?
Two banks, A and B, offered loans at 3.5% and 6% per annum, respectively. David borrowed an amount of ₹360000 from each bank. Find the positive difference between the amounts of simple interest paid to the two banks by David after 3 years.
There is a 20% discount on a dozen pairs of identical shoes marked at a combined price of ₹7,200. How many such pairs of shoes can be bought for ₹1,440?
The area of a triangle is 85 cm² and its base is 5 cm. Find the height of the triangle corresponding to this given base.
3 kg of apples and 4 kg of oranges cost ₹210, and 5 kg of apples and 2 kg of oranges cost ₹175. Find the cost of 1 kg of apples.
Find the mode for the following data of student ages:
16, 17, 15, 17, 16, 15, 14, 14, 13, 17, 13, 12, 12, 16, 10, 14, 17, 10, 11.
A sum was invested at a certain rate of simple interest per annum for 8 years. Had it been invested at a rate of simple interest per annum that is 8% higher than the rate at which the sum had been actually invested, it would have fetched ₹4,000 more as interest at the end of the 8-year period. What was the sum invested?
While packing birthday caps for a party in packs of 8 or 10, one cap was always left out. How many caps were there if there were more than 250 but less than 300 caps in the lot?
If the length I of a room is reduced by 10% and breadth b is increased by 10%, then find the positive change in its perimeter.
Mohan, Meena and Madhav enter into a partnership investing ₹3,000, ₹2,000 and ₹5,000 respectively. Find their respective shares in the annual profit of ₹5,600 in the given order of the names mentioned here
The base of the right-angled triangle is 3 m greater than its height. If its hypotenuse is 15 m, then find its area.
A pipe can fill an empty tank in 15 hours, but due to a leakage at the bottom, it is filled in 20 hours. If the tank is full, how long will the leakage take to empty it if no other entry or exit point in the tank is open?
A and B can do a piece of work in 28 days and 35 days, respectively. They work on alternate days starting with A till the work gets completed. How long (in days) would it take A and B to complete the work?
ഒരു ഡിറ്റർമിനന്റിന്റെ ഏതെങ്കിലും ഒരു വരിയിലെയോ നിരയിലെയോ എല്ലാ അംഗങ്ങളെയും k എന്ന സ്ഥിര സംഖ്യ കൊണ്ട് ഗുണിച്ചാൽ ഡിറ്റർമിനന്റിന്റെ വില
ഒരു ഡിറ്റർമിനന്റിന്റെ ഏതെങ്കിലും രണ്ടു വരികളോ അല്ലെങ്കിൽ രണ്ട നിരകളോ പരസ്പരം മാറ്റുകയാണെങ്കിൽ ഡിറ്റർമിനിന് എന്ത് സംഭവിക്കും?