How many numbers between 100 and 1000 have a digit sum less than or equal to 3?

How many squares are in a 4 by 4 grid?

If it takes 5 people to paint a house in 10 days, how many people will it take to paint 10 houses in 10 days?

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CCSS.6.RP.A.3B

Calculate the sum of every odd numbers from 1 to 20.

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CCSS.3.OA.D.9

How many different paths are there from Point A to Point B if you can only move up and to the right?

How many total diagonals are there in a 10-sided polygon?

If the perimeter of a rectangle is 24, what is the largest possible area of this rectangle?

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CCSS.4.MD.A.3

If a rectangle has area of 15, what is the largest possible perimeter for this rectangle?

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CCSS.4.MD.A.3

How many digits did I use to label page numbers of a book with 120 page?

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CCSS.2.MD.B.6

I used 69 digits to label the pages of a book. How many pages are there in the book?

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CCSS.1.NBT.A.1