Which of the following is the largest fraction   $${6\over7},{5\over6},{7\over8},{4\over5} ?$$ 

If the number x3339 is divisible by 11, what is the face value of x?

The product of two numbers is 24 times the difference of these two numbers. If the sum of these two numbers is 14. Find the larger number?

In a two - digit number, the digit at the unit's place is 1 less than twice the digit at the ten's place. If the digits at units and ten's place are interchanged, the difference between the new and the original number is less than the original number by 20. The original number is: 

A rational number between $${3\over4} $$ and $${3\over8} $$ is :

Direction : What value should come in place question mark(?) in the following questions?

4 × 5² – 3² × 7 + 6²=?+24

Two numbers are such that their difference, their sum and their product is in the ratio of 1: 7: 24. The product of numbers is

The mean of 20 items is 55. If two items 45 and 30 are removed, what will be the new mean of the remaining items?