Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 930 · 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.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
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.🧩 Saanvi is 10 years old. Meera is older than Saanvi. How old is Meera? (a) 11 (b) not enough info (c) 15 (d) 12
6. 6.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
7. 7.🧩 Diya bought 2 mangoes and a lunch box for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) not enough info (c) ₹128 (d) ₹130
8. 8.🧩 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
9. 9.📊 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
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
11. 11.🧩 Ananya bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹135 (b) not enough info (c) ₹45 (d) ₹50
12. 12.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
13. 13.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
15. 15.🧩 Meera bought 5 markers and a lunch box for ₹95 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹90 (c) ₹19 (d) ₹95
16. 16.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 40 (c) not enough info (d) 4
17. 17.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
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? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Tara is 6 years old. Rohan is older than Tara. How old is Rohan? (a) 8 (b) 7 (c) 11 (d) not enough info
21. 21.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 36 (c) 13 (d) 45
22. 22.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
23. 23.🧩 A box has 6 rows of eggs, with 6 in each row. How many eggs are in the box? (a) not enough info (b) 42 (c) 12 (d) 36
24. 24.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
25. 25.🧩 Vihaan bought 3 balls and a lunch box for ₹160 in all. Each ball cost the same. What did one ball cost? (a) ₹160 (b) ₹53 (c) not enough info (d) ₹157
26. 26.🥭 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) no, check more (c) yes, it is certain (d) yes, mangoes match
27. 27.🧩 Kabir bought 6 notebooks and a lunch box for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹214 (b) not enough info (c) ₹36 (d) ₹220
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
29. 29.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 8 PM (d) 7 PM
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
31. 31.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
32. 32.🧩 Ishaan is 9 years old. Rohan is older than Ishaan. How old is Rohan? (a) not enough info (b) 10 (c) 14 (d) 11
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
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: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
36. 36.🧩 A box has 8 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 32 (b) 12 (c) 36 (d) not enough info
37. 37.🧩 Aarav is 12 years old. Rohan is 7 years older than Aarav. How old is Rohan? (a) not enough info (b) 19 (c) 20 (d) 7
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
40. 40.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

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