Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 303 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
3. 3.🧩 A box has 5 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 10 (b) 30 (c) not enough info (d) 25
4. 4.🧩 A box has 3 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 7 (b) 12 (c) not enough info (d) 16
5. 5.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
6. 6.🧩 Kabir bought 2 mangoes and a water bottle for ₹160 in all. Each mango cost the same. What did one mango cost? (a) ₹80 (b) not enough info (c) ₹158 (d) ₹160
7. 7.🧩 Kabir bought 4 markers and a cap for ₹110 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹27 (c) ₹106 (d) ₹110
8. 8.🧩 Kabir bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) ₹50 (c) ₹45 (d) not enough info
9. 9.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
12. 12.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) not enough info (b) 90 (c) 9 (d) 18
13. 13.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
14. 14.🧩 Saanvi is 7 years old. Ananya is 6 years older than Saanvi. How old is Ananya? (a) 6 (b) 14 (c) 13 (d) not enough info
15. 15.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
17. 17.🧩 A box has 8 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 16 (b) 72 (c) 64 (d) not enough info
18. 18.🧩 Arjun bought 4 mangoes for ₹200 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹55 (c) ₹50 (d) ₹200
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
22. 22.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
23. 23.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
24. 24.🧩 Aarav bought 3 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹120 (d) ₹40
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Ananya is 12 years old. Tara is older than Ananya. How old is Tara? (a) 17 (b) 14 (c) not enough info (d) 13
27. 27.🧩 Nisha bought 4 notebooks and a water bottle for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) not enough info (c) ₹100 (d) ₹96
28. 28.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
29. 29.🧩 Meera is 9 years old. Aarav is older than Meera. How old is Aarav? (a) 10 (b) 11 (c) not enough info (d) 14
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Diya is 12 years old. Rohan is 5 years older than Diya. How old is Rohan? (a) 17 (b) not enough info (c) 5 (d) 18
32. 32.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
33. 33.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 24 (d) 30
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
35. 35.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
37. 37.🧩 Ananya bought 3 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹30
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Aarav bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹250 (b) ₹55 (c) not enough info (d) ₹50
40. 40.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 12 (c) 40 (d) 32

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