Quantitative Aptitude - Arithmetic Ability Questions

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

Choose the one which is odd from the following options.

If x + 1/x = 6, then value of x2 + 1/x2 is

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

Ramu can row 9 kmph in still water. It takes him twice as long to row up as to row down. Find the rate of stream.

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

The percent profit made when an article is sold for Rs. 78 is twice as much as when it is sold for Rs. 69, the cost price of the article is?

By increasing the price of entry ticket to a fair in the ratio 5:7, the number of visitors to the fair has decreased in the ratio 11:9. In what ratio has the total collection increased or decreased?