Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 947 · 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.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
2. 2.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
3. 3.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
4. 4.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
5. 5.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
6. 6.🧩 Kabir is 10 years old. Tara is older than Kabir. How old is Tara? (a) 12 (b) not enough info (c) 15 (d) 11
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
8. 8.🧩 A box has 4 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 8 (b) 16 (c) 20 (d) not enough info
9. 9.🧩 Rohan is 11 years old. Vihaan is 9 years older than Rohan. How old is Vihaan? (a) 20 (b) not enough info (c) 9 (d) 21
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Aarav is 9 years old. Nisha is 8 years older than Aarav. How old is Nisha? (a) 8 (b) not enough info (c) 18 (d) 17
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box has 7 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 16 (b) 72 (c) 63 (d) not enough info
14. 14.🧩 Aarav bought 5 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹200 (b) not enough info (c) ₹40 (d) ₹45
15. 15.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 6 PM (d) 10 PM
16. 16.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
17. 17.🧩 Meera bought 6 pens for ₹330 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹60 (c) ₹330 (d) not enough info
18. 18.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 50 (c) 10 (d) 5
19. 19.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give 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) False (b) True
21. 21.🧩 Tara bought 2 balls and a bag for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹128 (c) ₹130 (d) not enough info
22. 22.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Meera is 9 years old. Nisha is 5 years older than Meera. How old is Nisha? (a) 15 (b) 14 (c) 5 (d) not enough info
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
26. 26.🧩 Rohan is 9 years old. Ananya is 3 years older than Rohan. How old is Ananya? (a) 12 (b) 13 (c) not enough info (d) 3
27. 27.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
29. 29.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
30. 30.🧩 Ishaan is 8 years old. Tara is older than Ishaan. How old is Tara? (a) 9 (b) not enough info (c) 10 (d) 13
31. 31.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 9 PM (d) 8 PM
32. 32.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
33. 33.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
35. 35.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
36. 36.🧩 Kabir bought 6 pens and a bag for ₹350 in all. Each pen cost the same. What did one pen cost? (a) ₹58 (b) ₹344 (c) not enough info (d) ₹350
37. 37.🧩 A box has 7 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 63 (b) not enough info (c) 16 (d) 72
38. 38.🧩 Ishaan bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹300
39. 39.🧩 Arjun bought 5 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) not enough info (c) ₹35 (d) ₹150
40. 40.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM

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