If the sum and difference of two numbers are $20$ and $8$ respectively,then the difference of their squares is

$441.01 - 232.99 + 1649.99 = ? + 1225.92$

Three numbers are in the ratio $4: 5: 6$ and their average is $25$. The largest number is

There are two numbers such that the sum of twice the first number and thrice the second number is $100$ and the sum of thrice the first number and twice the second number is $120$. Which is the larger number?

The product of three consecutive even numbers is $4032$. The product of the first and the third number is $252$. What is five times the second number?

The difference between a two-digit number and the number obtained by interchanging the digits is $36$. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is $1:2$?