Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 601 · 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: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
2. 2.🧩 Rohan is 12 years old. Ananya is 3 years older than Rohan. How old is Ananya? (a) 15 (b) 3 (c) not enough info (d) 16
3. 3.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
4. 4.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
5. 5.🥭 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
6. 6.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 6 (b) 12 (c) not enough info (d) 60
7. 7.🧩 Kabir bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹65 (d) ₹180
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Vihaan bought 5 notebooks and a bag for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹235 (b) ₹240 (c) ₹48 (d) not enough info
10. 10.🧩 Arjun bought 2 pens and a cap for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹118
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
12. 12.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) 4 PM (d) not enough info
13. 13.🧩 Saanvi bought 6 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹35 (d) ₹180
14. 14.🧩 Rohan is 8 years old. Tara is 6 years older than Rohan. How old is Tara? (a) not enough info (b) 14 (c) 6 (d) 15
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Ishaan bought 2 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹20 (c) ₹30 (d) ₹15
17. 17.🧩 Diya bought 2 markers and a bag for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹168 (b) ₹85 (c) not enough info (d) ₹170
18. 18.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) 3 PM (d) not enough info
19. 19.🧩 Saanvi bought 6 kites and a cap for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹23 (b) ₹134 (c) ₹140 (d) not enough info
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
21. 21.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
23. 23.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) 9 PM (d) not enough info
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Arjun is 7 years old. Kabir is older than Arjun. How old is Kabir? (a) not enough info (b) 9 (c) 8 (d) 12
26. 26.🧩 A box has 5 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 30 (b) 36 (c) 11 (d) not enough info
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
28. 28.🧩 Vihaan bought 2 kites and a cap for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹85 (b) ₹168 (c) ₹170 (d) not enough info
29. 29.🧩 Nisha is 9 years old. Kabir is 8 years older than Nisha. How old is Kabir? (a) 17 (b) 8 (c) 18 (d) not enough info
30. 30.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
33. 33.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
34. 34.🧩 Meera is 10 years old. Diya is 4 years older than Meera. How old is Diya? (a) 15 (b) 4 (c) not enough info (d) 14
35. 35.🧩 Arjun is 11 years old. Ishaan is 4 years older than Arjun. How old is Ishaan? (a) not enough info (b) 15 (c) 4 (d) 16
36. 36.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) 2 PM (d) not enough info
37. 37.🧩 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
38. 38.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
39. 39.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True

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