Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 975 · 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.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 2 PM
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
3. 3.📊 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
4. 4.🧩 Aarav bought 2 markers and a bag for ₹120 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹118 (c) ₹60 (d) ₹120
5. 5.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 6 PM
6. 6.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
7. 7.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) no, check more (d) yes, mangoes match
8. 8.🧩 Saanvi is 7 years old. Tara is older than Saanvi. How old is Tara? (a) not enough info (b) 8 (c) 9 (d) 12
9. 9.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
10. 10.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 5 PM
11. 11.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
12. 12.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 2 PM
13. 13.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Tara bought 5 kites and a lunch box for ₹305 in all. Each kite cost the same. What did one kite cost? (a) ₹61 (b) not enough info (c) ₹305 (d) ₹300
15. 15.🧩 A box has 5 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 48 (b) 13 (c) 40 (d) not enough info
16. 16.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 2 PM (d) 5 PM
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
18. 18.🧩 Vihaan is 9 years old. Aarav is older than Vihaan. How old is Aarav? (a) 11 (b) 10 (c) not enough info (d) 14
19. 19.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 45 (b) 40 (c) 13 (d) not enough info
20. 20.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
21. 21.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
22. 22.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Nisha bought 2 kites for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹110 (d) ₹55
25. 25.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
26. 26.🧩 Kabir bought 5 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹100
27. 27.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Vihaan bought 3 markers for ₹135 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹135 (d) ₹45
29. 29.🧩 Tara is 7 years old. Kabir is 4 years older than Tara. How old is Kabir? (a) not enough info (b) 4 (c) 12 (d) 11
30. 30.🧩 Meera is 7 years old. Saanvi is older than Meera. How old is Saanvi? (a) 12 (b) 8 (c) 9 (d) not enough info
31. 31.🧩 Arjun bought 6 pens for ₹210 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹210 (c) ₹35 (d) ₹40
32. 32.🧩 Kabir is 11 years old. Aarav is older than Kabir. How old is Aarav? (a) 12 (b) 16 (c) not enough info (d) 13
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
34. 34.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 4 (d) 8
35. 35.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Aarav bought 6 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹90
39. 39.🧩 Arjun bought 2 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹45 (c) ₹80 (d) not enough info
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True

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