Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 981 · 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? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Kabir bought 2 kites for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) not enough info (c) ₹55 (d) ₹60
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
4. 4.🧩 Rohan bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹35 (c) not enough info (d) ₹30
5. 5.🧩 Rohan bought 3 notebooks and a water bottle for ₹115 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹112 (c) ₹38 (d) ₹115
6. 6.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 3 PM
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Tara bought 4 notebooks and a water bottle for ₹230 in all. Each notebook cost the same. What did one notebook cost? (a) ₹57 (b) not enough info (c) ₹226 (d) ₹230
9. 9.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
10. 10.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) 9 (c) not enough info (d) 20
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
12. 12.🧩 Ananya bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹140 (b) not enough info (c) ₹40 (d) ₹35
13. 13.🧩 Aarav is 9 years old. Saanvi is 5 years older than Aarav. How old is Saanvi? (a) not enough info (b) 5 (c) 14 (d) 15
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.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 7 PM
17. 17.🧩 Tara bought 2 pens and a cap for ₹50 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹25 (c) ₹50 (d) ₹48
18. 18.🧩 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
19. 19.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) facts that support it (d) a loud opinion
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
22. 22.🧩 A box has 5 rows of apples, with 9 in each row. How many apples are in the box? (a) 45 (b) 54 (c) not enough info (d) 14
23. 23.🧩 Aarav is 9 years old. Ananya is older than Aarav. How old is Ananya? (a) 11 (b) 10 (c) 14 (d) not enough info
24. 24.🧩 Vihaan bought 6 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹15 (c) ₹10 (d) not enough info
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
26. 26.🧩 Rohan is 12 years old. Aarav is 7 years older than Rohan. How old is Aarav? (a) 7 (b) not enough info (c) 20 (d) 19
27. 27.🥭 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, check more (c) yes, mangoes match (d) no mango is sweet
28. 28.🧩 Nisha bought 6 markers and a bag for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹294 (c) not enough info (d) ₹300
29. 29.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 11 (c) 28 (d) 35
30. 30.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
31. 31.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 16 (b) 63 (c) 72 (d) not enough info
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.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
34. 34.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
35. 35.🧩 A box has 4 rows of apples, with 9 in each row. How many apples are in the box? (a) 13 (b) 36 (c) 45 (d) not enough info
36. 36.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
37. 37.🧩 Saanvi bought 2 kites and a bag for ₹130 in all. Each kite cost the same. What did one kite cost? (a) ₹130 (b) ₹128 (c) ₹65 (d) not enough info
38. 38.🧩 Tara bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹20 (d) ₹25
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
40. 40.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 9 PM (d) 8 PM

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