Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 181 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
2. 2.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
3. 3.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
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
7. 7.🧩 Saanvi is 12 years old. Diya is 5 years older than Saanvi. How old is Diya? (a) 18 (b) 17 (c) not enough info (d) 5
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
12. 12.🧩 Meera bought 5 balls for ₹175 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) not enough info (c) ₹35 (d) ₹175
13. 13.🧩 Kabir bought 5 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹100 (c) ₹25 (d) not enough info
14. 14.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
16. 16.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 6 PM
17. 17.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 10 PM (c) 6 PM (d) 9 PM
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
21. 21.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
22. 22.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 54 (c) 48 (d) 14
23. 23.🧩 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
24. 24.🧩 A box has 6 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 49 (b) not enough info (c) 42 (d) 13
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 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
29. 29.🧩 Ishaan bought 2 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹60
30. 30.🧩 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
31. 31.🧩 Kabir bought 2 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹130 (b) ₹65 (c) ₹128 (d) not enough info
32. 32.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
33. 33.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Diya is 9 years old. Saanvi is older than Diya. How old is Saanvi? (a) not enough info (b) 11 (c) 14 (d) 10
35. 35.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
36. 36.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
37. 37.🧩 Ishaan is 7 years old. Kabir is older than Ishaan. How old is Kabir? (a) 9 (b) 8 (c) 12 (d) not enough info
38. 38.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
39. 39.🧩 Kabir bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹45
40. 40.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it

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