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Earn +20 ptsQ: What numbers add up to 91?
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Continue Learning about Math & Arithmetic
What is the average of 0 84 87 91 and 98?
The average is 72. To compute the average, you add up the numbers and then divide by the amount of numbers you have. So, in this case: 0 + 84 + 87 + 91 + 98 = 360 360 divided by 5 = 72
What two numbers multiply out to negative 546 but add up to 85?
631
What is the sum of all composite numbers between 90 and 100?
Add them up. 90, 91, 92, 93, 94, 95, 96, 98, 99, 100
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.
How many numbers are there up to 100 where the two digits add to 10?
110
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