Quantitative Aptitude - Arithmetic Ability Questions

The maximum value of 5+20x-4x2, when X is real number

Select the odd letters from the given alternatives.

Solution A contains 10% acid and solution B contains 30% acid. In what ratio should solution A be mixed with Solution B to obtain a mixture with 25% acid?

If the ratio of the cost price and the selling price of an article be 4:5, then the percentage of profit is:

The ratio of milk and water in three samples is 1 : 3, 3 : 5 and 11 : 5. A mixture containing equal quantities of all three samples is made. What will be the ratio of milk and water in the new mixture?

Of the 5 numbers whose average is 72, the first is 1/8 times the sum of other 4. The first number is _____.

The average revenues of 9 consecutive years of a company is Rs 80 lakhs. If the average of first 5 years is Rs 75 lakhs and that of last 5 years is Rs 87 lakhs, find the revenue for the 5th year.

What is the LCM of 64 and 56?