How many grams of water should be mixed in 9 grams of shaving lotion having 50% alcohol content so that the alcohol content in the lotion becomes 30%?

50 grams of an alloy of gold and silver contains 80% gold by weight, how much more gold should be mixed in this metal so that the alloy contains 95% gold?

There is 40% sugar in 3 liters of sugar solution, what percentage of sugar will be in the new solution if one liter of water is added to this solution?

In the number 15!/100, which digit will be in the unit's place?

If x + 1/√x = 6 then x² + 1/x² is equal to :-

1! + 2! + 3! + 4! + ......... + 50! Find the unit digit of?

If m + n = 1, then what will be the value of m³ + n³ + 3mn?

If a + b + c = 2, a² + b² + c² = 26 then the value of a³ + b³ + c³ – 3abc is