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The pH scale measures the acidity or alkalinity of aqueous solutions. When a solution turns blue litmus paper red, it indicates acidic properties. Acidic solutions always have a pH value less than 7, with stronger acids having lower values on the scale.
If the student scores 30% marks, then he is failed by 210 marks. But if he scores 55% marks then he is passed by 240 marks. Find the passing percentage....
A spent 30% and 20% of his monthly salary on food and rent, respectively. Of the remaining amount, he gave 21% and 14% to his mother and brother, respec...
In a test, P got 28% of total marks and failed by 40 marks while Q got 36% of total marks which is 20 more than passing marks. Find the total marks of t...
If price of grains is increased by 50%, by how much percent a person has to decrease his consumption of grains so that expenditure on grain increases on...
In a colony, there are 20 APL families and 30 BPL families. Each APL and BPL family got blankets equal to 30% and 60%, respectively of total number of f...
A and B have monthly incomes in the ratio of 6:5, respectively. Both save the same amount each month. A's monthly expenses are five times B's monthly sa...
Manish has some money left after spending 11%, 15% and 20% of monthly salary on rent, electricity and shopping respectively. The remaining money with Ma...
Monthly savings of ‘A’ is Rs. 1600 more than his monthly expenditure and his total monthly income is Rs. 4800. If his monthly income is increased by...
A teacher distributes 300 toffees among her 4 students, A, B, C and D. A gets x% of total toffees, B receives 2x% of the remaining toffees, C receives (...
