Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 312 · 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 checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) no, check more (d) yes, mangoes match
4. 4.🧩 Meera bought 5 balls for ₹275 in all. Each ball cost the same. What did one ball cost? (a) ₹275 (b) ₹55 (c) not enough info (d) ₹60
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
6. 6.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) not enough info (b) 9 (c) 90 (d) 18
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
8. 8.🧩 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
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
10. 10.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 54 (c) 63 (d) 15
11. 11.🧩 Vihaan bought 6 notebooks and a lunch box for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) ₹184 (b) not enough info (c) ₹31 (d) ₹190
12. 12.🧩 Rohan is 6 years old. Nisha is older than Rohan. How old is Nisha? (a) 8 (b) 11 (c) 7 (d) not enough info
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
14. 14.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 6 PM
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
16. 16.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
17. 17.🧩 Saanvi bought 3 pens and a cap for ₹65 in all. Each pen cost the same. What did one pen cost? (a) ₹21 (b) ₹65 (c) ₹62 (d) not enough info
18. 18.🧩 Kabir bought 3 notebooks for ₹45 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹45
19. 19.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
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
22. 22.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
25. 25.🧩 Diya is 8 years old. Meera is 6 years older than Diya. How old is Meera? (a) 15 (b) not enough info (c) 14 (d) 6
26. 26.🧩 Kabir is 11 years old. Meera is 9 years older than Kabir. How old is Meera? (a) 9 (b) 20 (c) not enough info (d) 21
27. 27.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
28. 28.🧩 Rohan is 12 years old. Arjun is 8 years older than Rohan. How old is Arjun? (a) 20 (b) 8 (c) not enough info (d) 21
29. 29.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Arjun is 9 years old. Saanvi is 8 years older than Arjun. How old is Saanvi? (a) 18 (b) not enough info (c) 8 (d) 17
32. 32.🧩 Kabir bought 3 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹10 (c) ₹15 (d) not enough info
33. 33.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) 3 PM (d) not enough info
36. 36.🧩 Kabir bought 3 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) ₹180 (c) not enough info (d) ₹60
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
38. 38.🧩 A box has 7 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 32 (c) 11 (d) 28
39. 39.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) not enough info (b) 64 (c) 16 (d) 72
40. 40.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence

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