Counting Numbers( Week 8 Evaluation) 2. What is the 4th odd number after 11? 3. What is the 20th even number after 10? 4. What is the 4th odd number before 34? 6. Please find the missing number in 6, 11, ?, 21, 26, ... 7. Richard walked into the classroom, and found that there were 7 students already there. How many students are there in the classroom now? 8. 13 children are playing hide and seek and 10 have been found. How many children are still hiding somewhere? 9. If you count by 9 from 9, you get a series of numbers 9, 18, 27, 36, .... What is the 2-digit number in the series with its tens digit being 1 more than its ones digit? 10. How many "1"s are there if you write down the natural numbers from 10 through 100? |