## Smallest number whose square has N digits

Given a number N, the task is to find the smallest number whose square has N digits. Examples: Input: N = 2 Output: 4 Explanation:… Read More »

- Last digit of sum of numbers in the given range in the Fibonacci series
- Print the sequence of size N in which every term is sum of previous K terms
- Find the Nth Pure number
- Find Nth term of the series where each term differs by 6 and 2 alternately
- Print Nth Stepping or Autobiographical number
- Program to print the series 1, 9, 17, 33, 49, 73, 97... till N terms
- Find the Sum of the series 1 + 2 + 9 + 64 + 625 + 7776 ... till N terms
- Count of ways to write N as a sum of three numbers
- Find position of given term in a series formed with only digits 4 and 7 allowed
- Total number Of valid Home delivery arrangements
- Count of K-countdowns in an Array
- Count the Arithmetic sequences in the Array of size at least 3
- Find the Sum of the series 1, 2, 3, 6, 9, 18, 27, 54, ... till N terms
- Number of cards needed build a House of Cards of a given level N
- Find the Nth term of the series 2, 15, 41, 80, 132...
- Check whether Array represents a Fibonacci Series or not
- Program to check if N is a Star Number
- Product of N terms of a given Geometric series
- Program to find the sum of the series 1 + x + x^2+ x^3+ .. + x^n
- Program to check if N is a Chiliagon Number
- Nth term of a sequence formed by sum of current term with product of its largest and smallest digit
- Find the sequence number of a triangular number
- Sum of alternating sign cubes of first N Natural numbers
- Program to check if N is a Tridecagonal Number or not
- Find the next Non-Fibonacci number
- Find the Nth Hogben Numbers
- Count of distinct pair sum between two 1 to N value Arrays
- Find Nth term of the series 2, 3, 10, 15, 26....
- Enneacontahexagon numbers
- Find the Nth row in Pascal's Triangle

Given a number N, the task is to find the smallest number whose square has N digits. Examples: Input: N = 2 Output: 4 Explanation:… Read More »

Junction Number is a number N if it can be written as K + SumOfDIgits(k) for at least two K. 101, 103, 105, 107, 109,… Read More »

Practical Number is a number N if all the numbers M < N can be written as the sum of distinct proper divisors of N.… Read More »

Tcefrep Number a number N such that reverse(n) = sum of the proper divisors of N. 6, 498906, 20671542, 41673714…. Check if N is a… Read More »

A Katadrome number is a number whose digits are in decreasing order. Few Katadrome numbers are: 0, 1, 2, 3, 4, 5, 6, 7, 8,… Read More »

Super Niven Number is a number N if it is divisible not only by the sum of its digits but also by the sum of… Read More »

A number N is called highly composite if it has more divisors than any of the smaller numbers than N. Few Highly composite numbers are:… Read More »

Pentacontahenagon Number is a class of figurate numbers. It has a 51 sided polygon called Pentacontahenagon. The N-th Pentacontahenagon number count’s the 51 number of… Read More »

Insolite Number is a number N if it is divisible by the Sum and by the Product of the squares of its digits. Few Insolite… Read More »

Saint-Exupery Number a number N such that N is the product of the three sides of Pythagorean triangle. Some of the Saint-Exupery numbers are: 60,… Read More »

A number is Superabundant Numberif sigma(n)/n > sigma(m)/m for all m < n, where sigma is the sum of the divisors of n. 1, 2,… Read More »

Magnanimous Number is a number of at least 2 digits such that the sum obtained inserting a “+” among its digit in any position gives… Read More »

A Tetracontapentagon Number is a class of figurate numbers. It has a 45 sided polygon called Tetracontapentagon. The N-th Tetracontapentagon number count’s the 45 number… Read More »

Pointer-Prime Number is a prime number p such that the next prime after p can be obtained from p by adding the product of the… Read More »

Repdigit Number is a number N which has all the digits in its representation in base B equal. Some of the Repdigit number are: 0,… Read More »