Quantitative Aptitude - Arithmetic Ability Questions

Which of the fractions given below is not equal to 4/11 ?

The average revenues of 7 consecutive years of a company is Rs 75 lakhs. If the average of first 4 years is Rs 70 lakhs and that of last 4 years is Rs 82 lakhs, what will be the revenue for the 4th year.

Mr. Mahesh sold a bus for Rs. 22,100 with a loss of 15%. At what price should the bus be sold to get a profit of 15%?

The difference between cost price and selling price is Rs 575. If profit percentage is 23%, then what is the selling price (in Rs)?

Present age of A is 2 times the present age of B. After 8 years the B's age will be 4 times of C's present age. If C celebrated his fifth birthday 9 years
ago, then what is the present age (in years) of A?

The mode of the data 12, 1, 10, 1, 9, 3, 4, 9, 7, 9 is

Find the least number to be added to 1739 so that it is exactly divisible by 11.

If a+b-62+a2b2+1+2b=2ab+2a, then the value of a is