Syntel Company Numerical Ability Arithmetic

Daal is now being sold at Rs. 20 a kg. During last month its rate was Rs. 16 per kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed? Ans. 20 %.

14. Find the least value of 3x + 4y if x2y3 = 6.

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Syntel Other Question
A cake seller sells one cake at a profit of 10% and sells another at a loss of 5%. Let the ratio of the CPs of the cakes is 2:3 respectively. Find his net profit or loss percentage. Solve for x and y: 1/x - 1/y = 1/3, 1/x^2 + 1/y^2 = 5/9