Second Grade Challenging Math
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2-6) The three McMath
sisters Amy, Betty and Cindy wear different color skirts to school. Their skirt colors are red, blue and yellow. Amy's skirt is not red and not blue. Betty's skirt is not blue. What color of skirt does each girl have on?  
2-7) Calculate the following: a) 999 + 99 + 2 = b) 998 + 998 + 4 + 9 + 9 = 2-8) Subtraction: fill in the blanks
| 6 | 7 |
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| 5 | 2 | | - | ___ | ___ |
| - | ___ | ___ |
| 4 | 2 |
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| 2 | 0 |
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| 9 | 5 |
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| 9 | 4 | | - | ___ | ___ |
| - | ___ | ___ |
| 2 | 4 |
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| 3 | 2 |
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2-9) Three kids eat 1 apple each at the same time. It took them 3 minutes to
eat them. How many minutes does it take for 6 kids to finish eating 6 apples? (Each kid eats 1 apple.) 
2-10) Bob likes to skip stones at the local pond. He collected 15 rocks and separated them into 5 piles. Each pile has a different number of rocks. How many rocks are there in each pile?
More challenging math problems for 2nd grade:
1-5 6-10 11-15
16-20
21-25
26-30
31-35
36-40
41-45
46-50
51-60
61-70
71-80
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