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Maximum number of 3-digit numbers that can be selected such that the sum of any two numbers is NOT divisible by 5

What is the maximum number of 3-digit numbers that can be selected such that the sum of any two numbers is NOT divisible by 5? # Run Python Program:  https://py3.codeskulptor.org/#user303_DO1Dc2Ko42WEolL.py # Question: What is maximum number of 3-didgit numbers that can be selected such that the sum of any two numbers #           is NOT divisible by 5? num_list = range(100,1000) #num_list = [100, 101, ... 998, 999] sum_of_2_not_div_by_5 = [100,]  # First number is 100. Its last digit is 0                                 # Last digit 0 added with 'any other number that is not divisible by 5'                                 # will result a number that will not be divisible by 5                              ...
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How to obtain Vietnam Visa?

Getting information on how to apply Viertnam visa is havoc if you do a internet search. 1-ONLINE eVISA (Easiest and cheapest) We have applied online eVisa for 11 person on https://evisa.xuatnhapcanh.gov.vn/ during our visit on June 2017 - One application per person - USD 25+1 per person, 30-50% cheaper than on-arrival visa. 80% cheaper that - Three working day for approval - Use white background photo craps in 2:3 ratio - Use reference number received in email and check/download eVisa https://evisa.xuatnhapcanh.gov.vn/tra-cuu-thi-thuc - Print eVisa and straight to to Vietname immigration - Save 1.5 hours time on Vietnam airport is you are not getting on-arrival visa 2- On Arrival Visa -  It is 2 part process - Why you want to Internet search will list few hundred agents. Ensure that there is no record of cheating of agent website - USD 6 to 28 for pre-approval letter. Pre-approval letter may have some other name of some other country as agent may apply ma...
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yamunaexpresswayauthority YEIDA refund

yamunaexpresswayauthority (YEIDA) is typical Sarkari Organization! How to request a refund from YEIDA I got my refund after ~ 3 months .  Bottom line is - if you will not follow-up, YEIDA does not bother to send refund even in the era of Digital India. The process is like this:       1-Send email to  queries (at) yamunaexpresswayauthority.com   immediately after draw has completed. Provide RTSG/NEFT transfer details ( screenshot from your account) in email.       2-Keep sending remainder on every alternate day until you get email that says - Bank of Baroda ( or whatever bank) has been advised to process a refund.     3-Wait for a couple of days and then repeat step 1     4- Escalation can be done  Contact our Key Officials       5-Post your query on  https://groups.google.com/forum/#!forum/yeida Does this information help you?
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What are the last 2 digits of the sum 1 + 11 + 111 + ... + 111...111 (last one has 50 digits)?

This is a question from Junior Math Olympiad. Question : What are the last 2 digits of the sum 1 + 11 + 111 + ... + 111...111 (last one has 50 digits)? Solution : Here is tiny python program. Also available http://www.codeskulptor.org/#user43_XiVvNuzfshT3lKX.py # What are the last 2 digits of the sum  # 1 + 11 + 111 + ... + 111...111 (last one has 50 digits? total_num = 50 this_num = 0 sum = 0 for i in range(total_num):             this_num = 10 ** i + this_num             print "Number " + str(i+1) +":", this_num             sum = sum + this_num print "Total Sum:", sum Output: Number 1: 1 Number 2: 11 Number 3: 111 Number 4: 1111 Number 5: 11111 Number 6: 111111 Number 7: 1111111 Number 8: 11111111 Number 9: 111111111 Number 10: 1111111111 Number 11: 11111111111 Number 12: 111111111111 Number 13: 1111111111111 Number 14: 11111111111111 Number 15: 1111111111...
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