Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 104 · 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.🧩 Aarav bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹65
2. 2.🧩 Nisha bought 5 markers for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹200 (b) ₹45 (c) not enough info (d) ₹40
3. 3.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
4. 4.🐕 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
5. 5.🧩 Saanvi bought 5 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹300 (b) ₹60 (c) ₹65 (d) not enough info
6. 6.🧩 Nisha is 10 years old. Arjun is 6 years older than Nisha. How old is Arjun? (a) 16 (b) 17 (c) 6 (d) not enough info
7. 7.🧩 Nisha bought 2 kites and a water bottle for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) not enough info (c) ₹68 (d) ₹35
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
9. 9.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
10. 10.🧩 Saanvi bought 6 kites and a cap for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) not enough info (c) ₹210 (d) ₹204
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
16. 16.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) 5 PM (d) not enough info
17. 17.🧩 A box has 6 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 13 (b) 42 (c) 49 (d) not enough info
18. 18.🧩 Meera bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹55 (c) ₹50 (d) ₹200
19. 19.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
20. 20.🧩 Rohan bought 3 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹25 (c) not enough info (d) ₹20
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
22. 22.🧩 Kabir bought 2 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹65 (d) ₹120
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
24. 24.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
25. 25.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
26. 26.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
27. 27.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
28. 28.🧩 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
29. 29.🧩 Aarav bought 6 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹300 (b) ₹55 (c) ₹50 (d) not enough info
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
32. 32.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
33. 33.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
34. 34.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 12 (c) 6 (d) not enough info
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
36. 36.🥭 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) no, check more (c) no mango is sweet (d) yes, it is certain
37. 37.🧩 Ananya is 7 years old. Arjun is 7 years older than Ananya. How old is Arjun? (a) 15 (b) 7 (c) not enough info (d) 14
38. 38.🧩 Diya bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹110 (b) ₹60 (c) not enough info (d) ₹55
39. 39.🧩 Arjun bought 6 mangoes and a bag for ₹310 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹51 (c) ₹304 (d) ₹310
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False

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