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Celeste International School

Grade 1 · Worksheet

Pattern & probability

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    A pattern that repeats in the same order over and over is called a...?

    1. Arandom pattern
    2. Bregular pattern
    3. Cnumber line
  2. 2.

    Carry on the pattern: red, blue, red, blue, red, ___?

    1. Ablue
    2. Bred
    3. Cgreen
  3. 3.

    Carry on the counting pattern: 10, 20, 30, 40, ___?

  4. 4.

    Carry on the pattern: 20, 21, 22, 23, 24, ___?

  5. 5.

    A regular pattern repeats in the same order.

    True False
  6. 6.

    A cat will read you a book today. This...?

    1. Awon't happen
    2. Bmight happen
    3. Cwill happen
  7. 7.

    You will eat some food today. This...?

    1. Awon't happen
    2. Bwill happen
    3. Cmight happen
  8. 8.

    You toss a coin. It can land on...?

    1. Aheads or tails
    2. Ba number
    3. Conly heads
  9. 9.

    You turn over a card showing 8 (the cards go from 0 to 9). The next card is more likely to be...?

    1. Ahigher
    2. Bthe same
    3. Clower
  10. 10.

    Order these chance words from least likely to most likely.

    Write the order (least likely to most likely) in the boxes:

    • ?might happen
    • ?will happen
    • ?won't happen
  11. 11.

    Carry on the counting pattern: 5, 10, 15, 20, ___?

  12. 12.

    It is sure that the sun will set this evening, so it will happen.

    True False
  13. 13.

    A spinner has 3 brown parts and only 1 white part. The arrow is most likely to land on...?

    1. Awhite
    2. Bbrown
    3. Cred
  14. 14.

    How likely is it that you roll a number greater than 1 on a dice?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  15. 15.

    What number comes just after 92?

  16. 16.

    A bag has 1 red and 2 blue balls. How likely is it that you pick a red ball?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  17. 17.

    A sequence is 8, 10, 12, 14, … What is the next term?

  18. 18.

    How likely is it that you roll a 3 on a normal 6-sided dice?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  19. 19.

    A bag has 6 red and 0 blue balls. How likely is it that you pick a red ball?

    1. AImpossible
    2. BUnlikely
    3. CEven chance
    4. DLikely
    5. ECertain
  20. 20.

    Continue the counting pattern.

    5101520
Celeste International School

Answer key

Pattern & probability

  1. 1.B. regular pattern
  2. 2.A. blue
  3. 3.50
  4. 4.25
  5. 5.True
  6. 6.A. won't happen
  7. 7.B. will happen
  8. 8.A. heads or tails
  9. 9.C. lower
  10. 10.won't happen, might happen, will happen
  11. 11.25
  12. 12.True
  13. 13.B. brown
  14. 14.D. Likely
  15. 15.93
  16. 16.B. Unlikely
  17. 17.16
  18. 18.B. Unlikely
  19. 19.E. Certain
  20. 20.25, 30