The prime factors of 13195 are 5, 7, 13 and 29.
What is the largest prime factor of the number 600851475143 ?
Solution Approach :
Simple approach would be to identify all the prime numbers under the square root of the number 600851475143 which divide the the number 600851475143. When you find a prime factor using this method, keep the track of largest such number to get our result. Read More…
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, …
By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
Question starts of with introduction to Fibonacci sequence, which by the way, is a very interesting topic and highly encourage you guys to read about it in web whenever you get time.
Idea is to get the “next” element of Fibonacci series by adding the “present” and “previous” element. When the element is an even number, add to the “sum” variable. Very simple indeed. Give it a try for yourself before checking the problem solution below. Read More…
Problem Statement :
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of 3 or 5 below 1000.
Being the first problem of the series, its quite a simple one. there are many ways to approach this problem.
Most simplest one is to iterate through all the numbers from 3 to 1000 and check if its divisible by 3 or 5. If they are, just add them to the sum. Read More…
Image uploading and manipulating them can be such a pain in the you-know-what. Even if you are working in a awesome framework like Codeigniter . So, we are gonna keep a code safe in this blog, which we can always come back and “copy paste” when and where required. What are we aiming here ? I am building a website with lots of users in it and users have a profile with profile pic. User can upload pic and use it as their avatar for the site. User can upload the picture of any size and we need to manipulate it to fit our requirement. Simple! Lets start then.
1) Upload an Image (duh! )
2) Manipulate it and create a thumbnail for it ! ( oh, yeah 😉 ! )
3) Display it where ever required ! Read More…
Are you getting started with PHP ? Then you gotta know these facts about php. It will help to generate interest in yourself and encourage others to learn php.
Many of these facts are reason for PHP being so popular. I can across these ones while learning the stuff online, doing some research. These may seem basic stuff, but you should know it any case. Its always to make your foundation strong every time, no matter what you are learning. Right ? So, here we go ! Read More…