
1. 
EASY

What comes next: 2, 4, 6, ...

2. 
EASY

What comes next: 25, 30, 35, ...

3. 
MEDIUM

What comes next: 5, 7, 9, ...

4. 
MEDIUM

What comes next: 5, 15, 25, ...

5. 
MEDIUM

Erin counts by 3s starting at the number 1. Which number will Erin not say?

6. 
MEDIUM

Eric counts by 5s, starting at 0. What will all his numbers end with? For example, 23 ends with 3, and 7 ends with 7.
 5
 0
 10
 Both A and B
 None of the above

7. 
MEDIUM

Ezreal counts by 2 starting from the number 1. Which number will he skip?

8. 
HARD

Adam counts by 2s starting from the number 10. What will his fourth number be?

9. 
HARD

Hilda starts from a certain number and counts by 10s. She reaches 60 on her third number. What was Hilda's starting number?

10. 
HARD

I start with the number 12. I start counting by a certain quantity up until my sixth number, 22. What number did I count by?

