Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 648 · 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.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
4. 4.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
6. 6.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
7. 7.🧩 Ishaan is 12 years old. Ananya is 2 years older than Ishaan. How old is Ananya? (a) not enough info (b) 2 (c) 15 (d) 14
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
11. 11.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
12. 12.📊 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
13. 13.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 3 PM
14. 14.🧩 Aarav bought 6 notebooks for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹40 (d) ₹210
15. 15.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
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
17. 17.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
18. 18.🧩 Diya bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹20 (c) ₹25 (d) not enough info
19. 19.🧩 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
20. 20.🧩 Nisha bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹180 (d) ₹65
21. 21.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) 3 PM (d) not enough info
22. 22.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
23. 23.🧩 Ananya bought 6 notebooks for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹40 (c) ₹35 (d) ₹210
24. 24.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
25. 25.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
26. 26.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
27. 27.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
28. 28.🧩 Kabir is 8 years old. Meera is 8 years older than Kabir. How old is Meera? (a) 17 (b) 16 (c) not enough info (d) 8
29. 29.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Ananya is 11 years old. Arjun is 3 years older than Ananya. How old is Arjun? (a) not enough info (b) 14 (c) 3 (d) 15
31. 31.🧩 Diya bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) not enough info (c) ₹30 (d) ₹150
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
33. 33.🧩 Aarav is 10 years old. Diya is older than Aarav. How old is Diya? (a) 11 (b) not enough info (c) 15 (d) 12
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Kabir is 6 years old. Nisha is 3 years older than Kabir. How old is Nisha? (a) 10 (b) 9 (c) not enough info (d) 3
36. 36.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
37. 37.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Tara is 6 years old. Aarav is older than Tara. How old is Aarav? (a) 8 (b) not enough info (c) 11 (d) 7
39. 39.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True

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