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#If nums is equal pair number in num_list return 'Pass'
def checksum(num_list, nums):
    
    for i in range(len(num_list)):
        for j in range(i+1, len(num_list)):
            if num_list[i]+num_list[j] == nums:
                return('Pass')
    return('False')
                
checksum([9, -3, 7, 15, 3], 1)
'False'
## 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.

sum = 0
for i in range(1,1000):
    if((i % 3 == 0 ) or (i % 5 == 0)):
        
        sum+=i

print(sum)
    
233168

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.

max = 4000000
i = 1
sum = 0
while(sum<10):