3rd Grade Math Challenge

Arrays

100

4 rows of 6 apples

24

200

7 columns of 6 marbles

42

300

6 rows of 9 shells

54

400

8 columns of 7 books

56

500

12 rows of 6 keys

72

Perimeter

100

square with 4 on one of its sides

16

200

rectangle with 5 on one side and 4 on one side

18

300

pentagon with 6 on one of its sides

30

400

trapezoid with 5, 7, 8, and 6 on its four  sides

26

500

The total perimeter of three squares with 5 on each of its sides 

60

Quadrilaterals

100

equal sides, 4 right angles

square

200

1 pair of parallel lines

trapezoid

300

4 equal sides, no right angles

rhombus

400

any shape with 4 sides is called a ___.

quadrilateral

500

2 pairs of parallel lines, 2 pairs of sides that are equal

rectangle

Elapsed Time

100

I started 1:20 and stopped at 1:45. How many minutes passed?

25 minutes

200

I started 4:30 and stopped at 6:30. How many hours passed?

2 hours

300

I started 12:05 and stopped at 4:15. How many hours and minutes passed?

4 hours, 10 minutes

400

I stopped 8:30 and it took me 1 hour and 20 minutes to fix a broken bike. What time did I started working on it?

7:10

500

I started 7:43 and continued playing for 2 hours and 16 minutes. What time did I finish playing?

9:59

Mass/Capacity

100

If each water bottle is one liter and I had 5 rows of 7 water bottles, how many liters are there in all?

30 liters

200

How many kilograms is 4,000 grams of sugar?

4 kg

300

If I had 3 kilograms of weights and  3 five hundred  grams of weights, how many grams are there in all?

4,500 grams

400

I have five 100 gram stones. I also have 3 kg. of rocks. How much did they all weigh in grams?

3,500 grams

500

Mr. Koffee have 4,500 grams of candy. Ms. Adams has 2,500 grams of candy. How many kilograms do we have in all? 

7 kg