Question 29: Write 4-digit natural numbers made up of the digits 0 and 1 in which each digit occurs twice.


Quiz Question 29: Write 4-digit natural numbers made up of the digits 0 and 1 in which each digit occurs twice.





Think and answer the question before looking at the answer

Suppose the number to look up is abcd

We perform the following steps:

The number to look for is a natural number, so a 0 infers a = 1. So we have 1 and two 0s left to put in the remaining 3

If we put the digit 0 in position b, we get the number we need to find is 1001 or 1010

If we put the digit 1 in position b, we get the number we need to find is 1100

So we have three numbers to find is 1001; 1010; 1100

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QUIZ MATH 6

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