Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 832 · 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: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
4. 4.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
5. 5.🧩 Vihaan is 10 years old. Nisha is older than Vihaan. How old is Nisha? (a) 12 (b) 11 (c) 15 (d) not enough info
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
8. 8.📊 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
9. 9.🥭 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) yes, mangoes match (d) no, check more
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Vihaan bought 2 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹40 (c) not enough info (d) ₹80
12. 12.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
13. 13.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 28 (b) 35 (c) not enough info (d) 11
14. 14.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Kabir bought 3 notebooks for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹40 (d) ₹105
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.🐕 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
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
21. 21.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
22. 22.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 20 (b) 9 (c) 25 (d) not enough info
23. 23.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 9 PM (d) 8 PM
24. 24.🧩 Diya bought 5 markers and a cap for ₹315 in all. Each marker cost the same. What did one marker cost? (a) ₹315 (b) ₹310 (c) not enough info (d) ₹63
25. 25.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 70 (b) not enough info (c) 14 (d) 7
26. 26.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Diya bought 6 mangoes and a bag for ₹280 in all. Each mango cost the same. What did one mango cost? (a) ₹46 (b) ₹274 (c) not enough info (d) ₹280
28. 28.🧩 Kabir bought 3 pens and a cap for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹117 (c) ₹120 (d) not enough info
29. 29.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Kabir is 8 years old. Ananya is older than Kabir. How old is Ananya? (a) 13 (b) 9 (c) 10 (d) not enough info
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
32. 32.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 6 PM (c) 4 PM (d) not enough info
33. 33.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
35. 35.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
36. 36.🧩 Aarav bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹45
37. 37.🧩 Diya is 10 years old. Aarav is 8 years older than Diya. How old is Aarav? (a) 19 (b) 8 (c) not enough info (d) 18
38. 38.🧩 Meera is 10 years old. Arjun is older than Meera. How old is Arjun? (a) 12 (b) not enough info (c) 11 (d) 15
39. 39.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
40. 40.🧩 Ishaan bought 3 markers and a bag for ₹125 in all. Each marker cost the same. What did one marker cost? (a) ₹41 (b) ₹125 (c) not enough info (d) ₹122

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