Level 1
Find the missing number. 36 : _____ = 81 : 45
1 m
Level 1
What is the missing number? 12 : 32 = ___ : 56
1 m
Level 1
Find the following values without a calculator.

Simplify the following ratios.
  1. 1 : 3 = _____ : 9
  2. _____ : 4 = 12 : 16
  3. 1 : _____ = 5 : 25
  4. 2 : _____ : 12 = 10 : 25 : 60
2 m
Level 2
24 : 27 : 3 = 16 : _____ : 2
2 m