Write a program that reverses the input number. Formulate an equation to come up with the answer. Enter a number : 1238 Reverse Number: 8321

A triangular number or triangle number counts the objects that can form an equilateral triangle. The nth triangle number is the number of dots or balls in a triangle with n dots on a side; it is the sum of the n natural numbers from 1 to n.Mathematically, the nth triangular number Tn is defined as: Tn=n(n+1)/2Write a C++ program that: reads a positive integer k from the user. If the user enters a negative value, then the program should continue prompting until he/she enters a positive integer value.  Then, the program should compute a series of first k triangular number and displaythem as illustrated in the sample output. Also the program will count how many ODD and EVEN triangular numbers in the series(respectively) and display it as illustrated in the sample output. Finally, the program will compute and sum up the members of the series and display the result as illustrated in the sample output.The program must use at least two functions as following:1. A function to compute the…

Write a C++ program that asks the user to enter the radius of the circle and then find the Circumference and area of the circle. Cir= 2* pi *R Area= pi*R*R

A pair of primes that vary by two is a pair of twin primes (e.g., 3 and 5, 101 and 103). Write a C++ application that displays the total number of twin primes smaller than 1000.