A Glossary of Common Words for “Thích Toán Học-Math-Olympiad”


A Glossary of Common Words for “Thích Toán Học-Math-Olympiad”

This list includes various words and phrases that the children entering”TTH-Math-Olympiad” are assumed to understand. We advise parents to ensure that all children are familiar with their meanings before the start of the  “TTH-Math-Olympiad” competition. You may wish to review these terms before each Set.

Perimeter The boundary of a shape.

Also, the distance measured around a shape.

  • A man walks around the perimeter of a lake.
  • The perimeter of a 4 cm by 5 cm rectangle is 18 cm.
Whole number A number from the set {0, 1, 2, 3, 4, …}.
  • 12 is a whole number.
  • 3.8 is not a whole number.
Counting number A number from the set {1, 2, 3, 4, …}.
  • 12 is a counting number.
  • 0, -1 and 4.1 are not counting numbers.
Sum The result of adding two or more numbers together.
  • The sum of 3, 4 and 5 is 12.
  • The sum of the first 10 counting numbers is 55.
Product The result of multiplying two or more numbers together.
  • The product of 3, 4 and 5 is 60.
  • The product of 2 with any whole number is always even.
Multiple A multiple of a number is the product of that number with a whole number.
  • 12 is a multiple of 3 (since 12 = 3 × 4).
  • 100 is a multiple of 20 (since 100 = 20 × 5).
  • 24 is not a multiple of 9.
Divisible A whole number is divisible by another number if the first is a multiple of the second.
  • 12 is divisible by 3.
  • 100 is divisible by 20.
  • 24 is not divisible by 9.
Factor If a whole number is divisible by another whole number, the second is a factor of the first.
  • 3 is a factor of 12.
  • 20 is a factor of 100.
  • 9 is not a factor of 24.
  • The number 28 has 6 factors (namely 1, 2, 4, 7, 14, 28).
Prime number A whole number greater than 1 whose only factors are 1 and the number itself.
  • The first ten prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.

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