Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 61 · 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.🧩 Vihaan bought 5 kites and a water bottle for ₹205 in all. Each kite cost the same. What did one kite cost? (a) ₹41 (b) not enough info (c) ₹205 (d) ₹200
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Meera is 10 years old. Tara is 5 years older than Meera. How old is Tara? (a) 5 (b) 15 (c) not enough info (d) 16
4. 4.🧩 A box has 8 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 17 (b) not enough info (c) 81 (d) 72
5. 5.🧩 Diya is 8 years old. Vihaan is 5 years older than Diya. How old is Vihaan? (a) 13 (b) 5 (c) 14 (d) not enough info
6. 6.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
7. 7.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
9. 9.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
10. 10.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 4 PM
11. 11.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 6 PM
12. 12.🧩 Aarav bought 3 pens and a lunch box for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹122 (b) not enough info (c) ₹125 (d) ₹41
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
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.🧩 Nisha bought 6 notebooks and a cap for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹160 (b) not enough info (c) ₹154 (d) ₹26
17. 17.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
18. 18.📊 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
19. 19.🧩 Nisha is 12 years old. Kabir is 2 years older than Nisha. How old is Kabir? (a) 14 (b) 15 (c) not enough info (d) 2
20. 20.🧩 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
21. 21.🥭 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 mango is sweet (c) no, check more (d) yes, it is certain
22. 22.🧩 Meera bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹275
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Aarav bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹275 (c) not enough info (d) ₹55
25. 25.🧩 Aarav bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹150
26. 26.🧩 Tara bought 4 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹120 (c) not enough info (d) ₹30
27. 27.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
29. 29.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) 7 PM (d) not enough info
30. 30.🧩 Meera bought 4 kites for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹160 (b) ₹45 (c) ₹40 (d) not enough info
31. 31.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
32. 32.🧩 Meera is 8 years old. Rohan is 4 years older than Meera. How old is Rohan? (a) 4 (b) not enough info (c) 12 (d) 13
33. 33.🧩 Meera bought 3 mangoes for ₹165 in all. Each mango cost the same. What did one mango cost? (a) ₹165 (b) ₹60 (c) not enough info (d) ₹55
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
35. 35.🧩 Ishaan bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹10 (c) ₹15 (d) not enough info
36. 36.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
37. 37.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info
38. 38.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
39. 39.🧩 Aarav bought 4 balls and a bag for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹120 (b) not enough info (c) ₹116 (d) ₹30
40. 40.🧩 Rohan bought 4 markers and a water bottle for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹42 (b) ₹166 (c) ₹170 (d) not enough info

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