Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 788 · 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: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
4. 4.🧩 Ishaan bought 5 notebooks and a bag for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹145 (b) not enough info (c) ₹30 (d) ₹150
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
6. 6.🧩 Kabir bought 4 pens for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹140 (d) ₹35
7. 7.🧩 Aarav bought 5 notebooks and a cap for ₹320 in all. Each notebook cost the same. What did one notebook cost? (a) ₹64 (b) not enough info (c) ₹315 (d) ₹320
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
9. 9.🧩 Rohan bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) not enough info (c) ₹40 (d) ₹20
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 3 PM
14. 14.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
15. 15.🧩 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
16. 16.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
18. 18.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
19. 19.🧩 Arjun is 9 years old. Diya is 3 years older than Arjun. How old is Diya? (a) 12 (b) 3 (c) not enough info (d) 13
20. 20.🧩 Meera bought 3 notebooks and a cap for ₹205 in all. Each notebook cost the same. What did one notebook cost? (a) ₹202 (b) ₹68 (c) ₹205 (d) not enough info
21. 21.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
22. 22.🧩 Arjun is 6 years old. Rohan is older than Arjun. How old is Rohan? (a) 7 (b) 11 (c) 8 (d) not enough info
23. 23.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 5 (c) 10 (d) 50
24. 24.🥭 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) yes, mangoes match (c) no, check more (d) no mango is sweet
25. 25.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Aarav bought 4 markers and a lunch box for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹76 (b) not enough info (c) ₹20 (d) ₹80
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
28. 28.🧩 Kabir bought 5 balls and a lunch box for ₹205 in all. Each ball cost the same. What did one ball cost? (a) ₹205 (b) ₹41 (c) ₹200 (d) not enough info
29. 29.🧩 A box has 4 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 12 (b) 40 (c) 32 (d) not enough info
30. 30.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
31. 31.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
32. 32.🧩 Vihaan bought 4 notebooks and a bag for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹176 (b) ₹180 (c) not enough info (d) ₹45
33. 33.🧩 Ishaan is 8 years old. Kabir is older than Ishaan. How old is Kabir? (a) 9 (b) not enough info (c) 10 (d) 13
34. 34.🧩 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
35. 35.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
36. 36.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
37. 37.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Ananya bought 3 kites and a water bottle for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) not enough info (c) ₹210 (d) ₹207
39. 39.🧩 A box has 7 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 32 (b) 28 (c) 11 (d) not enough info
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence

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