Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 570 · 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.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
2. 2.🧩 Diya is 11 years old. Nisha is 7 years older than Diya. How old is Nisha? (a) not enough info (b) 19 (c) 18 (d) 7
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
7. 7.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 6 PM
8. 8.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
9. 9.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
10. 10.🧩 Ananya is 7 years old. Tara is older than Ananya. How old is Tara? (a) 12 (b) 9 (c) 8 (d) not enough info
11. 11.🧩 Nisha is 7 years old. Arjun is older than Nisha. How old is Arjun? (a) 9 (b) 12 (c) not enough info (d) 8
12. 12.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
15. 15.🧩 Saanvi is 11 years old. Vihaan is 3 years older than Saanvi. How old is Vihaan? (a) 15 (b) 14 (c) not enough info (d) 3
16. 16.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 40 (b) not enough info (c) 13 (d) 45
17. 17.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
18. 18.🧩 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
19. 19.🧩 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
20. 20.🧩 Aarav is 11 years old. Ishaan is 7 years older than Aarav. How old is Ishaan? (a) 18 (b) not enough info (c) 19 (d) 7
21. 21.🧩 Ishaan is 10 years old. Saanvi is older than Ishaan. How old is Saanvi? (a) 11 (b) 12 (c) 15 (d) not enough info
22. 22.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
23. 23.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 8 PM
24. 24.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
25. 25.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 9 PM
26. 26.🧩 Diya is 12 years old. Tara is 3 years older than Diya. How old is Tara? (a) 3 (b) not enough info (c) 15 (d) 16
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
29. 29.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
30. 30.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
31. 31.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 72 (b) 64 (c) not enough info (d) 16
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
33. 33.🧩 Vihaan is 12 years old. Kabir is older than Vihaan. How old is Kabir? (a) 17 (b) not enough info (c) 13 (d) 14
34. 34.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 4 PM
35. 35.🧩 Ishaan bought 2 mangoes and a cap for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹60 (c) not enough info (d) ₹58
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
37. 37.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 12 (b) 36 (c) not enough info (d) 27
38. 38.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
39. 39.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
40. 40.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM

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