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Earn +20 ptsQ: What two two digit numbers make the sum of 78?
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Continue Learning about Statistics
Using four different digits what is the least sum you can get when you add two digit numbers?
2222
How many two digit numbers can you make using the digits 1 2 and 3?
9
How many three digit whole numbers are there?
There are only 999 three digit whole numbers.
How many 5 digit combinations for numbers 1- 25?
There are 9 1-digit numbers and 16-2 digit numbers. So a 5 digit combination is obtained as:Five 1-digit numbers and no 2-digit numbers: 126 combinationsThree 1-digit numbers and one 2-digit number: 1344 combinationsOne 1-digit numbers and two 2-digit numbers: 1080 combinationsThat makes a total of 2550 combinations. This scheme does not differentiate between {13, 24, 5} and {1, 2, 3, 4, 5}. Adjusting for that would complicate the calculation considerably and reduce the number of combinations.
What are all the two digit numbers?
Any number with 2 numbers in it is a 2. Example: 95 They are numbers 10 - 99.
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