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.
program language (python)
In Python :
suma,sumaPre,konačanSuma = 3,2,0
while(sumaPre<4000000):
suma+=sumaPre
sumaPre=suma-sumaPre
if suma % 2 == 0:
konačanSuma+=suma
print (konačanSuma + 2)
second problem is done 🙂 .
problem 3
The prime factors of 13195 are 5, 7, 13 and 29.
What is the largest prime factor of the number 600851475143 ?