Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 567 · 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.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🥭 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) no, check more (c) yes, mangoes match (d) no mango is sweet
6. 6.🧩 Ananya is 7 years old. Ishaan is older than Ananya. How old is Ishaan? (a) not enough info (b) 12 (c) 9 (d) 8
7. 7.🧩 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
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
9. 9.🧩 Ishaan is 9 years old. Saanvi is older than Ishaan. How old is Saanvi? (a) 10 (b) 11 (c) 14 (d) not enough info
10. 10.🧩 Aarav bought 6 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) not enough info (c) ₹180 (d) ₹30
11. 11.🧩 Diya is 11 years old. Saanvi is older than Diya. How old is Saanvi? (a) 12 (b) not enough info (c) 16 (d) 13
12. 12.📊 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
13. 13.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
14. 14.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
16. 16.🧩 Meera is 7 years old. Kabir is 8 years older than Meera. How old is Kabir? (a) not enough info (b) 15 (c) 8 (d) 16
17. 17.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 7 PM (d) 6 PM
18. 18.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
19. 19.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
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
21. 21.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
22. 22.🧩 Kabir bought 6 balls and a water bottle for ₹340 in all. Each ball cost the same. What did one ball cost? (a) ₹56 (b) ₹334 (c) not enough info (d) ₹340
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
24. 24.🧩 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
25. 25.🧩 Meera bought 2 notebooks and a water bottle for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹100 (d) ₹98
26. 26.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
28. 28.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.🧩 Kabir bought 3 markers for ₹45 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹20 (c) ₹45 (d) not enough info
31. 31.🧩 Ananya is 11 years old. Ishaan is 5 years older than Ananya. How old is Ishaan? (a) 17 (b) 16 (c) 5 (d) not enough info
32. 32.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 9 (b) not enough info (c) 90 (d) 18
33. 33.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
34. 34.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) 3 PM (d) not enough info
35. 35.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
36. 36.🧩 Ishaan bought 4 kites and a water bottle for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹62 (b) ₹250 (c) not enough info (d) ₹246
37. 37.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 9 (b) 20 (c) not enough info (d) 25
38. 38.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
39. 39.🧩 Saanvi is 6 years old. Kabir is 6 years older than Saanvi. How old is Kabir? (a) 13 (b) 6 (c) 12 (d) not enough info
40. 40.🧩 A box has 8 rows of apples, with 5 in each row. How many apples are in the box? (a) 45 (b) 13 (c) 40 (d) not enough info

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