# Math

posted by .

When you add the number of rows in my array to the number in each row, you get 15. My digits add up to 9. Which number am I?

• Math -

81

## Similar Questions

1. ### maths

Set it up this way: Let the number of students be x let the number of rows be y then the number of students per row is x/y This results in 2 equations from your data: (x/y+1)(y-2) = x and (x/y-1)(y+3 = x Solve these two, gets a bit …
2. ### Math

What do the digits in the number 15 add up to?
3. ### math

1. First of all, pick the number of times a week that you eat chocolate. This number must be more than one but less than ten. 2. Multiply this number by 2 (just to be bold). 3. Add 5 (for Sunday). 4. Multiply it by 50. 5. Add 1750. …
4. ### Discrete Mathematics

Mathematical sequences can be used to model real life applications. Suppose you want to construct a movie theater in your town. The number of seats in each row can be modeled by the formula C_n = 16 + 4n, when n refers to the nth row, …
5. ### math

I am a 2-digit even number. I am less than. 60. Add my digits to get 12. Subtract one of my digits from the other to get 4. What number am i?
6. ### math

Question1: find the least perfect squared number that is divisible by 12, 16,20 and 24. Question2: a gardener with 5770 plants to arrange them such that the number of rows of plants equals the number of plants in each row. When he …
7. ### Math

Question2: a gardener with 5770 plants to arrange them such that the number of rows of plants equals the number of plants in each row. When he does so,he discovers that the number of plants falls short by 6 .find the number of rows …
8. ### maths

students are made to stand in equal rows with equal number of students.if 4 students are added to each row ,the number of rows will be reduce by 2 otherwise if 4 students are deducted from each row, the numer of rows will be increased …
9. ### Math

From left to right the first three digits of a 4 digits number add up to 8 which digits could be in the ones place if the 4 digit number is divisible by 6
10. ### Math

The largest 4 digit number which is exactly divisible by 18, 25 and 35. Find the smallest number by which 1008 must be. multiplied to get a perfect square. Also find the square root of square so obtained. 1225 plants are to be planted …

More Similar Questions