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1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is one example.

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โˆ™ 2011-09-08 17:02:02
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Q: What numbers add up to 21 that have 1 digit?
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Related questions

How do you add a 3 digit number and a two digit number?

You line up the last numbers and then add it!


What 4 numbers add up to 21?

25


What six odd numbers add up to 100?

21, 21, 21, 21 , 15, 1


How many three digit numbers have digits that add up to zero?

None. The only way for it to be possible would be 3 zeros which is not considered a 3 digit numbers.


How many two-digit numbers have digits that add up to 10?

To make the list of two-digit numbers with digits that add up to 10, first write the pairs of single-digit integers that add up to 10. They are (1,9), (2,8), (3,7), (4,6), (5,5). Then recognize that each of these pairs of numbers, except 5, can be combined in two different ways to make two-digit numbers that satisfy the problem. 19 and 91 28 and 82 37 and 73 46 and 64 55 So there are nine two-digit numbers with digits that add up to 10.


Composite numbers up to100 have 1 as their unit's digit?

21, 51, 81, 91.


What 3 consecutive numbers add up to 18?

21


What two concecutive numbers add up to 41?

20 and 21


What two numbers add up to 21 and multiply 30?

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What 2-digit prime number has a sum of 10 when you add up its digits?

Two-digit prime numbers whose digits add up to 10 are:193773


What 4 single digit numbers add up to 24?

28


What is the five consecutive numbers that add up to 115?

The numbers are 21, 22, 23, 24, and 25.


What are the two numbers whose product is 84 and add up to -25?

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What two consecutive integers add up to -41?

The numbers are -21 and -20.


What two numbers can add up to 26 and multiply to 315?

341


What 4 digit numbers add up to the sum 15706?

15710


What is a 3 digit number that all its digits are odd and add up to 7?

10


What 2 consecutive numbers add up to 21?

23


What three consecutive numbers add up to sixty six?

21, 22, 23


What two numbers add up to 21 and multiply to 90?

111


What two numbers add up to 75 and multiply to 1134?

1209


What are four consecutive numbers that add up to 90?

21, 22, 23, 24


How many three digit numbers add up to 17?

An infinite number if you can use positive and negative numbers.


What 2 numbers times together to get -20 and add up to get 2?

The numbers are: 1 plus square root of 21 and 1 minus square root of 21


What is a two digit multiple of 7 that it's digit add up to 8?

15