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Second number = (first digit of first number) + (second digit of first number)²
For '72: 70': = 7 + (2)² = 11.
Similarly, for '65: ?': = 6 + (5)² = 31.
A student multiplied a number by 8/5 instead of 5/8. What is the percentage error in the calculation?
Income of A is twice the income of B. B and A spend 50% and 60% respectively of their incomes. Find the savings of A, if B saves Rs. 12000 in a month.
In a Lok Sabha election, two candidates vied for a parliamentary seat. Out of the total eligible voters in the constituency, 20% opted not to exercise t...
The marks scored by a boy in three subjects are in the ratio 3 : 5 : 6. Boy scored an overall aggregate of 70% in the exam. If the maximum marks in each...
A student scores 44% in a test and falls short by 16 marks for passing. The test is out of 250 marks. What is the minimum passing percentage?
Raj's income is Rs. 25,000, which is 20% lower than Ram's income. Ram saves a certain amount and spends Rs. 1,750 more than what he saves. We need to d...
A spent 30% of his monthly income on study and 60% of the remaining on rent. If amount spent on rent is Rs. 840, then find the amount spent on study
The incomes of Ajay and Pawan are in the ratio of 5:3. Ajay allocates 20% of his income to food, spends 25% of the remaining amount on education, and sa...
A man spends 72% of his income. If his income increases by 28% and his expenditure increases by 25%, then what is the percentage increase or decrease in...
