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Start learning 50% faster. Sign in nowSum of first 12 numbers = (12 x 30) = 360 Sum of last 5 numbers = (50 x 5) = 250 Sum of 11th and 12th number = (360 - 250) = 110 So, 12th number = 110 x (5/11) = 50
If (x - 5)2 - (x + 5)2 = 0, then what is the value of 'x'?
One type of liquid contains 15% of benzene, the other contains 20% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the secon...
The average age of 19 girls is 45 years. If the age of one more girl is added the average decreases by half a year. What is the age of new girl?
A train overtakes a bus traveling at a speed of 5 m/s in 8 seconds. If the length of the train is 160 meters, determine the speed...
A vessel is full of a mixture of kerosene and petrol in which there is 18% kerosene, 8 litre are drawn off and then the vessel is filled with petrol. Re...
A shopkeeper has 76 kg rice a part of it, he sells at the profit of 48% and rest at loss of 28% and he get the loss of 16% so what is the quantity sold ...
In a jar initially containing 'm' liters of pure milk costing Rs. 20 per liter, 50% of the milk is taken out, and honey is added to the remaining milk. ...
Ajay lists an item at 42% higher than its cost price and gives a 20% discount on this marked price. Determine the percentage of p...
A car travel 20km/h for 30 min and at x km/h for 45 min. If the average speed of the car for entire journey is 14 km/h find the value of x.
In a mixture of milk and water, there is only 16% water. After replacing the mixture with 8 liters of pure milk , the percentage of milk in the mixture ...
