Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 588 · 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? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
3. 3.🥭 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
4. 4.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
5. 5.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 6 PM (c) 7 PM (d) not enough info
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
7. 7.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 8 PM (d) 7 PM
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Saanvi bought 2 mangoes for ₹20 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹10
10. 10.🧩 Nisha is 11 years old. Ishaan is 7 years older than Nisha. How old is Ishaan? (a) 19 (b) 7 (c) not enough info (d) 18
11. 11.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
12. 12.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
13. 13.🧩 Meera is 10 years old. Nisha is 9 years older than Meera. How old is Nisha? (a) 19 (b) 20 (c) 9 (d) not enough info
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
15. 15.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 5 PM (c) 4 PM (d) not enough info
16. 16.🧩 Saanvi bought 5 notebooks for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) ₹225 (b) ₹45 (c) not enough info (d) ₹50
17. 17.🧩 Meera bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹55 (d) ₹200
18. 18.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
19. 19.🧩 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
20. 20.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
21. 21.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
22. 22.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) for fun only (d) to be sure of results
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
24. 24.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Nisha bought 6 pens and a cap for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹28 (b) ₹164 (c) ₹170 (d) not enough info
28. 28.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
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Aarav bought 3 balls and a lunch box for ₹135 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹132 (c) ₹45 (d) ₹135
33. 33.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 6 PM
34. 34.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
35. 35.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
36. 36.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) not enough info (c) 3 PM (d) 4 PM
37. 37.🧩 Vihaan is 7 years old. Kabir is older than Vihaan. How old is Kabir? (a) 12 (b) 9 (c) not enough info (d) 8
38. 38.🧩 Vihaan bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹110 (b) ₹60 (c) ₹55 (d) not enough info
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True

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