Let x+4 = m x = m – 4 Now, x² + x = 11 (m – 4)² + m – 4 = 11 m² + 16 - 8m + m – 4 – 11 = 0 m² + 1 - 7m = 0 m² + 1 = 7m Dividing the equation by m We get, m + 1/m = 7 m³ + 1/m³ = (m + 1/m)³ - 3(m + 1/m) = 343 – 21 = 322
A man donated 22%, 11% and 26% of his income to three NGOs ‘A’, ‘B’ and ‘C’, respectively. They spent 75%, 80% and 50% of respective sums re...
A chair is sold for Rs 720 after giving a discount of 10% on its marked price. The cost price of the chair is Rs 640. If it is sold at the marked price,...
P spends 26% of his salary on transportation, 24% on food, 22% on children’s education and 19% on medical. He deposits the remaining amount of Rs....
A spent 23% of his monthly income on study and 44% of the remaining on rent. If amount spent on rent is Rs. 1694, then find the amount spent on study
A man spends 22% and 14% of his monthly salary on rent and transportation, respectively. Out of the remaining money, he spends 32% on food and 47% on en...
A factory produces 1200 units of product X in a day. The production rate of product Y is 25% more than that of product X. In the next 5 days, the factor...
In a given years, A sold 1200 caps while B sold 20% more number of caps than A and C sold 10% less number of caps than B. Find the ratio between the num...
A company allowed 9% commission on the total sales made by the salesman and a bonus of 1% on the sales over Rs. 40000. If the salesman deposited Rs. 108...
The respective ratio of monthly income of A to monthly income of B is 11:12, and A’s saving is (100/17)% more than B’s saving. Find the expenditure ...
1100 boys and 700 girls are examined in a test; 42% of the boys and 30% of the girls pass. The percentage of the total who failed is :
