Brain Teasers
Missing Numbers
What are the missing numbers in the sequence below?
10, 12, 18, 20, 21, 24, 27, 30, ??, ??
10, 12, 18, 20, 21, 24, 27, 30, ??, ??
Hint
If you solve it, you will find great joy.These are not the last numbers in this sequence.
Answer
36 & 40.This is a series of the first 10 Harshad numbers, or Niven numbers, with more than one digit in base 10. A Harshad number is an integer that is divisible by the sum of its digits in a given number base.
The name "Harshad" is based on a Sanskrit word that means "great joy".
Hide Hint Show Hint Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments hidden to avoid spoilers.
Follow Braingle!