## 60 Numeric Problem to strengthen your Competitive Coding skills

Competitive programming is a coding sport in which people compete to programme according to given requirements over the Internet or a local network.

Winning competitions are very valuable for a developer to get selected in the worlds most popular companies, you say it FAANG.

→ You should read and try to learn each of these question, if:

✪ Are you planning to be a competitive coder?

✪ But not sure how to start?

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Now Without any further waiting, Let’s Start the article:

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Questions on Geometry

- Find distance between 2 points
- Given 2 sides of a right angle triangle, find the 3rd
- Area of a right angle triangle
- Area of a Square
- Area of a Rectangle
- Area of a Circle
- Volume of a Sphere
- Volume of a Cube

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Questions on Matrix

- Find the determinant of a matrix
- Find Scalar Multiplication of a matrix
- Find addition/subtraction of a matrices
- Find the transpose of a matrix
- Find if 2 matrices are orthogonal
- Find inverse of a 2×2 and 3×3 matrix

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Questions on Numbers

- Find a digit at a specific place in a number
- Find count of digits in a number
- Find the largest digit
- Find the 2nd largest digit
- Find the smallest digit
- Find the 2nd smallest digit
- Find generic root (sum of all digits) of a number
- Reverse the digits in a number
- Rotate the digits in a number
- Is the number a palindrome?
- Find the binary, octal and hexadecimal equivalent
- Convert a binary, octal and hexadecimal to a decimal

13 Find sum of ‘n’ numbers - Find the factorial of a number
- Find the exponentiation of a number
- Check if a number is perfect square
- Find a number in an AP sequence
- Find a number in a GP sequence
- Find a number in fibonacci sequence
- Check number divisibility by 2, 3, 5, 9
- Check if a number is primary or not
- Given a number, print all primes smaller than it
- Check if a number is circular prime or not
- Find all prime factors of a number
- Find the GCD of 2 numbers
- Find the LCM of 2 numbers

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Questions on Sets

- Find Union of 2 sets
- Find Intersection of 2 sets
- Find the Difference of 2 sets
- Find the Symmetric Difference of 2 sets
- Find if a set is subset/superset of another set
- Find if 2 sets are disjoints

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Questions on Vector

- Find Scalar Multiplication of a vector
- Find addition/subtraction of vectors
- Find dot product of 2 vectors
- Find cross product of 2 vectors

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Questions on Matrix

- Find the determinant of a matrix
- Find Scalar Multiplication of a matrix
- Find addition/subtraction of a matrices
- Find the transpose of a matrix
- Find if 2 matrices are orthogonal
- Find inverse of a 2×2 and 3×3 matrix

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Questions on Sets

- Find Union of 2 sets
- Find Intersection of 2 sets
- Find the Difference of 2 sets
- Find the Symmetric Difference of 2 sets
- Find if a set is subset/superset of another set
- Find if 2 sets are disjoints

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Questions on Special Numbers

- Strong Number
- Perfect Number
- Armstrong Number
- Harshad Number
- Kaprekar Number
- Lychrel Number
- Narcissistic Decimal Number
- Lucus Number
- Catalan Number
- Duck Number

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Source: DEV Community

December 1, 2021