Level 1
Level 2
Level 3
100
How many numbers are in the list:
36, 37, 38, …, 92, 93?
58
100
How many multiples of 10 are between 9 and 101?
10
100
How many squares do you see?
14 squares
1+4+9
200
How many numbers are in the list:
4, 6, 8, …, 128, 130?
64
200
How many multiples of 10 are between 11 and 103?
9
200
I'm thinking of two whole numbers. Their product is 32 and their sum is 12. What is the larger number?
8
300
How many positive multiples of 7 are less than 150?
21
300
What is the sum of the first sixty-one positive integers?
1891
400
What is the sum from 1 to 15?
120
400
What is the value of the sum
5+10+15+...+95+100?
1050
400
Casey's shop class is making a golf trophy. He has to paint 180 dimples on a golf ball. If it takes him 5 seconds to paint one dimple, how many minutes will he need to do his job?
15
500
Given two positive numbers "a" and "b", with "b > a" , find a formula for how many numbers there are between "a" and "b" inclusive.
b - a + 1
500
What is the sum
-100+(-99)+(-98)+...+97+98
-199
500
Granny Smith has $72. Elberta has $3 more than Anjou and Anjou has one-fourth as much as Granny Smith. How many dollars does Elberta have?
21