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Proportional Reasoning-1

Checkpoint: proportion, rates and scales

Five more ideas, five more questions. Feedback comes as you answer, and you can retry any time.

Is 6 : 9 equal to 8 : 12?

Seven pens cost ₹161. What do four cost?

A parking charge is ₹20 at the gate plus ₹5 an hour. Are hours and charge in direct proportion?

A tap fills 45 litres in 5 minutes. How much does it fill in 8 minutes?

A map has a scale of 1 : 25,000. Two places are 6 cm apart. How far apart are they?

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This track

  1. 0 Start here
  2. 1 How much more, and how many times
  3. 2 What 3 : 2 says, and what it does not
  4. 3 The same comparison in bigger numbers
  5. 4 Match the units, then cut it down
  6. 5 Sharing an amount in a ratio
  7. 6 Checkpoint: comparing, writing and sharing
  8. 7 Two ratios that are equal
  9. 8 Find the value of one
  10. 9 When two amounts grow together
  11. 10 A rate is a ratio with units on it
  12. 11 A scale is a ratio you can walk
  13. 12 Checkpoint: proportion, rates and scales
  14. 13 The big picture
  15. 14 Track quiz

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