Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 704 · 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.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
2. 2.🧩 Tara is 8 years old. Kabir is older than Tara. How old is Kabir? (a) 13 (b) not enough info (c) 9 (d) 10
3. 3.🧩 Meera is 7 years old. Diya is 6 years older than Meera. How old is Diya? (a) 13 (b) 14 (c) not enough info (d) 6
4. 4.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
6. 6.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
7. 7.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 40 (c) 12 (d) 32
8. 8.🧩 Vihaan bought 4 markers for ₹140 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹35 (d) ₹140
9. 9.🧩 Aarav bought 6 mangoes and a water bottle for ₹310 in all. Each mango cost the same. What did one mango cost? (a) ₹310 (b) ₹51 (c) ₹304 (d) not enough info
10. 10.🧩 Ishaan is 6 years old. Diya is older than Ishaan. How old is Diya? (a) 7 (b) not enough info (c) 8 (d) 11
11. 11.🧩 A box has 4 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 32 (b) not enough info (c) 40 (d) 12
12. 12.🧩 Saanvi bought 4 balls and a water bottle for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹136 (b) ₹140 (c) ₹35 (d) not enough info
13. 13.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
15. 15.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) yes, it is certain (d) no, check more
16. 16.🧩 Diya bought 6 markers and a lunch box for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹240 (d) ₹234
17. 17.🧩 Kabir is 7 years old. Diya is 4 years older than Kabir. How old is Diya? (a) 11 (b) 12 (c) not enough info (d) 4
18. 18.🧩 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
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Ananya bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹60 (c) not enough info (d) ₹15
22. 22.🧩 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
23. 23.🧩 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
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
25. 25.🧩 Kabir bought 2 markers and a cap for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) ₹88 (c) ₹90 (d) not enough info
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
28. 28.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
29. 29.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 4 PM (c) 7 PM (d) 8 PM
30. 30.🧩 Vihaan is 9 years old. Ananya is 5 years older than Vihaan. How old is Ananya? (a) 14 (b) not enough info (c) 15 (d) 5
31. 31.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 6 PM
33. 33.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 16 (b) 12 (c) 7 (d) not enough info
34. 34.🧩 Rohan bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹70 (c) ₹35 (d) ₹40
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
36. 36.🧩 Meera is 11 years old. Aarav is 3 years older than Meera. How old is Aarav? (a) 15 (b) not enough info (c) 14 (d) 3
37. 37.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 42 (b) 48 (c) not enough info (d) 13
38. 38.🧩 Kabir bought 3 notebooks and a water bottle for ₹245 in all. Each notebook cost the same. What did one notebook cost? (a) ₹242 (b) ₹81 (c) not enough info (d) ₹245
39. 39.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence

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