1998 MATH OLYMPIAD ANSWERS
Grade 5 Answers
Number sense
- 36
- 200
- 51
- 3 and 3/4 mi or 3.75 mi
- 5
Measurement
- 40
- area=112 sq in or in2, perim=74 in (2 points each, subtract 1 point each if units are not correct)
- 128
- 9 hours
- 62 sq m or 62 m2
Geometrical sense
- 165 degrees or 165o
- A and E
- 2/3 cm or .67 cm or .6 cm
- 165 degrees or 165o
- 64 sq cm or 64 cm2
Probability and statistics
- mean=56.7, median=58, mode=58, range=13 or (49 - 62) or (62 - 49) (1 point each)
- 7/18
- 1320
- 76
- 728,910
Algebraic sense
- 450
- 22 degrees or 22 o
- 151
- 54
- 16
Grade 6 Answers
Number sense
- 51
- at 1
- 3 and 3/4 mi or 3.75 mi
- 72
- 126
Measurement
- 50
- 128
- 4/3 or (1 and 1/3) or 1.3 (with bar over 3 to indicate repeating)
- 62 sq m or 62 m2
- 3 hours
Geometrical sense
- 165 degrees or 165o
- 48 cu ft or 48 ft3
- 5 cm
- 80 degrees or 80 o
- Any number between 10.73 and 10.75 inclusive and also 50 - 12.5pi sq in or in2
Probability and statistics
- 25/102 or 24.5% or .245
- 1320
- 190
- 728,910
- 32
Algebraic sense
- 16
- 600
- 344
- 4
- 25 or 25%