Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 504 · 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) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) 24 (b) 32 (c) 11 (d) not enough info
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
5. 5.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 2 PM (c) not enough info (d) 4 PM
6. 6.🧩 Kabir is 8 years old. Nisha is 4 years older than Kabir. How old is Nisha? (a) not enough info (b) 13 (c) 4 (d) 12
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
9. 9.🐕 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
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
11. 11.🧩 A box has 5 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 30 (b) 11 (c) not enough info (d) 36
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.🧩 A box has 5 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 10 (b) 30 (c) not enough info (d) 25
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.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
16. 16.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 15 (c) 54 (d) 63
17. 17.🧩 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
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Diya is 8 years old. Ananya is older than Diya. How old is Ananya? (a) not enough info (b) 13 (c) 9 (d) 10
20. 20.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
21. 21.🧩 A box has 6 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 15 (b) 63 (c) not enough info (d) 54
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
23. 23.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
25. 25.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 20 (c) 25 (d) 9
26. 26.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 7 PM
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
28. 28.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
29. 29.🧩 Vihaan bought 4 markers and a lunch box for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹266 (b) ₹67 (c) not enough info (d) ₹270
30. 30.🧩 Aarav bought 2 pens and a bag for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹58 (c) ₹60 (d) not enough info
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
32. 32.🧩 A box has 8 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 64 (b) 16 (c) not enough info (d) 72
33. 33.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
34. 34.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 36 (b) 45 (c) not enough info (d) 13
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
37. 37.🧩 Kabir is 9 years old. Aarav is older than Kabir. How old is Aarav? (a) 14 (b) not enough info (c) 11 (d) 10
38. 38.🧩 Vihaan bought 6 mangoes and a bag for ₹390 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) ₹390 (c) not enough info (d) ₹384
39. 39.🧩 Nisha is 7 years old. Ananya is 4 years older than Nisha. How old is Ananya? (a) 12 (b) 11 (c) not enough info (d) 4
40. 40.🧩 Kabir bought 6 mangoes for ₹210 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹35 (c) ₹210 (d) ₹40

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