Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 941 · 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? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Nisha is 11 years old. Rohan is older than Nisha. How old is Rohan? (a) 12 (b) not enough info (c) 16 (d) 13
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Vihaan bought 3 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹120 (b) ₹40 (c) not enough info (d) ₹45
6. 6.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
7. 7.🧩 Ishaan bought 5 mangoes for ₹275 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹275
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
9. 9.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 9 PM (d) 6 PM
10. 10.🧩 A box has 6 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 30 (b) not enough info (c) 11 (d) 35
11. 11.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 6 PM (c) 3 PM (d) not enough info
13. 13.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
14. 14.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
15. 15.🥭 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) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
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 7 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 42 (c) 13 (d) 48
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
21. 21.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
22. 22.🧩 Nisha bought 6 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹300 (b) ₹50 (c) not enough info (d) ₹55
23. 23.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
24. 24.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 5 PM (d) 7 PM
25. 25.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
26. 26.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
28. 28.🧩 Diya is 10 years old. Nisha is 4 years older than Diya. How old is Nisha? (a) not enough info (b) 15 (c) 14 (d) 4
29. 29.🧩 Saanvi bought 2 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹20 (c) not enough info (d) ₹25
30. 30.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
31. 31.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Diya is 12 years old. Meera is older than Diya. How old is Meera? (a) 13 (b) not enough info (c) 14 (d) 17
34. 34.🧩 Nisha bought 3 balls for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹165 (b) ₹55 (c) ₹60 (d) not enough info
35. 35.🧩 Arjun is 6 years old. Rohan is older than Arjun. How old is Rohan? (a) not enough info (b) 11 (c) 8 (d) 7
36. 36.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 7 PM
37. 37.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 5 PM
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
39. 39.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 2 PM (c) 5 PM (d) not enough info
40. 40.🧩 Aarav bought 5 notebooks and a lunch box for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹180 (c) ₹175 (d) ₹36

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