Koplow Games Linear Measurement dice is used to test students understanding of the terms or operations, sold as 10 per pack. They can be added, multiplied or divided to yield results that test a students understanding of the terms and operations. Can be combined with operators and numbers or used alone to create challenging questions. Set of 10 measurement dice (inch, foot, yard and mile). Dice is appropriate for that age group of 6 - 18 years and grades K - 12th. Warning choking hazard: Small parts, not for children under 3 years. Each individual set contains 10 Dice, Bundle of 6 sets, 60 Dice total.