Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 406 · 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? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
2. 2.🥭 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 mango is sweet (c) no, check more (d) yes, mangoes match
3. 3.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
4. 4.🧩 Ananya bought 6 pens and a cap for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹264 (b) ₹270 (c) ₹45 (d) not enough info
5. 5.🧩 A box has 6 rows of apples, with 8 in each row. How many apples are in the box? (a) 48 (b) not enough info (c) 56 (d) 14
6. 6.🧩 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
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
9. 9.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
10. 10.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 7 PM
11. 11.🧩 A box has 4 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 30 (b) 10 (c) not enough info (d) 24
12. 12.🧩 Meera is 8 years old. Diya is 7 years older than Meera. How old is Diya? (a) 15 (b) not enough info (c) 16 (d) 7
13. 13.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
14. 14.🧩 Kabir bought 2 kites for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) ₹35 (c) not enough info (d) ₹40
15. 15.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 3 PM
16. 16.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
17. 17.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 3 PM
19. 19.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 5 PM (c) 7 PM (d) not enough info
20. 20.🧩 Kabir is 9 years old. Rohan is older than Kabir. How old is Rohan? (a) 14 (b) 10 (c) 11 (d) not enough info
21. 21.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
22. 22.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
24. 24.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Diya is 11 years old. Vihaan is older than Diya. How old is Vihaan? (a) 12 (b) 13 (c) not enough info (d) 16
27. 27.🧩 Aarav bought 3 markers and a cap for ₹85 in all. Each marker cost the same. What did one marker cost? (a) ₹85 (b) not enough info (c) ₹28 (d) ₹82
28. 28.🧩 Meera is 7 years old. Tara is 5 years older than Meera. How old is Tara? (a) 13 (b) 12 (c) not enough info (d) 5
29. 29.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
30. 30.🧩 Meera is 9 years old. Vihaan is older than Meera. How old is Vihaan? (a) 11 (b) 10 (c) 14 (d) not enough info
31. 31.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
32. 32.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
33. 33.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 12 (c) 40 (d) 32
34. 34.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
35. 35.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
37. 37.🧩 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
38. 38.🧩 Meera bought 5 notebooks for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) ₹175 (b) ₹40 (c) not enough info (d) ₹35
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
40. 40.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence

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