JBC Expert Team Solutions for Exercise 1: Exercise 1

The number obtained by interchanging the digits of a two-digit number is less than the original number by $63.$ If the sum of the digits of the numbers $11,$ what is the original number?
 

The sum of twice a number and three times of $42$ is $238$. What is the sum of thrice the number and two times of $42$?

There are some parrots and some tigers in a forest. If the total number of animal heads in the forest are $858$ and the total number of animal legs are $1746,$ what is the number of parrots in the forest?

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?