Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 235 · 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? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
4. 4.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 30 (b) 10 (c) 24 (d) not enough info
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, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
7. 7.🧩 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
8. 8.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
9. 9.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Tara bought 4 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹10 (c) ₹15 (d) not enough info
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 12 (b) not enough info (c) 36 (d) 27
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
15. 15.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
16. 16.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) 50 (c) not enough info (d) 10
17. 17.🧩 Vihaan is 9 years old. Ishaan is 3 years older than Vihaan. How old is Ishaan? (a) 3 (b) not enough info (c) 12 (d) 13
18. 18.🧩 Ananya is 6 years old. Ishaan is 8 years older than Ananya. How old is Ishaan? (a) not enough info (b) 15 (c) 14 (d) 8
19. 19.🧩 Ananya bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹110 (c) ₹55 (d) ₹60
20. 20.🧩 Diya bought 6 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹15 (c) ₹10 (d) not enough info
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
22. 22.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) 60 (c) not enough info (d) 12
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
24. 24.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Arjun bought 6 notebooks for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹55 (c) ₹330 (d) ₹60
27. 27.🧩 Arjun is 12 years old. Ishaan is older than Arjun. How old is Ishaan? (a) 14 (b) 17 (c) not enough info (d) 13
28. 28.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
29. 29.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
31. 31.🧩 A box has 5 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 30 (b) 25 (c) not enough info (d) 10
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
33. 33.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
34. 34.🧩 Tara bought 6 balls for ₹330 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹55 (c) ₹330 (d) not enough info
35. 35.🧩 Aarav bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹75 (b) ₹25 (c) not enough info (d) ₹30
36. 36.🧩 A box has 8 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 48 (b) 54 (c) 14 (d) not enough info
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
38. 38.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
39. 39.🧩 Meera bought 6 markers and a cap for ₹230 in all. Each marker cost the same. What did one marker cost? (a) ₹224 (b) not enough info (c) ₹38 (d) ₹230
40. 40.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence

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