What is the sum of the interior angles of a triangle?
How many 4-digit numbers have the property that the product of their digits is a multiple of 8? Mathcounts National Sprint Round Problems And Solutions
Find the radius of a small circle tangent to a larger semicircle, given the arc length and the radius of the larger circle. What is the sum of the interior angles of a triangle
✅ (108) (This level is straightforward but punishes careless arithmetic.) Mathcounts National Sprint Round Problems And Solutions
( 12 \times 15 = 180 ) ( 8 \times 9 = 72 ) ( 180 - 72 = 108 )
On average, you have 80 seconds per problem. However, you should aim to clear the first 10 problems in under 5 minutes to save time for the "monsters" at the end.