Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 139 · 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: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
4. 4.🥭 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, check more (c) no mango is sweet (d) yes, mangoes match
5. 5.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
6. 6.🧩 Saanvi bought 5 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) not enough info (c) ₹300 (d) ₹65
7. 7.🧩 Ishaan bought 6 mangoes and a cap for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹110 (b) ₹104 (c) ₹18 (d) not enough info
8. 8.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
9. 9.🧩 Arjun is 12 years old. Saanvi is 2 years older than Arjun. How old is Saanvi? (a) not enough info (b) 15 (c) 14 (d) 2
10. 10.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 4 PM (c) 7 PM (d) not enough info
11. 11.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Nisha is 12 years old. Rohan is older than Nisha. How old is Rohan? (a) 14 (b) 13 (c) 17 (d) not enough info
13. 13.🧩 Aarav is 10 years old. Kabir is 5 years older than Aarav. How old is Kabir? (a) 5 (b) 15 (c) 16 (d) not enough info
14. 14.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
16. 16.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
17. 17.🧩 Rohan bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹15 (c) not enough info (d) ₹20
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
19. 19.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
20. 20.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
24. 24.🧩 Meera bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹180 (d) ₹65
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
26. 26.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
28. 28.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
29. 29.🧩 Saanvi is 8 years old. Arjun is 4 years older than Saanvi. How old is Arjun? (a) 4 (b) 13 (c) 12 (d) not enough info
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box has 8 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 81 (b) not enough info (c) 17 (d) 72
35. 35.🧩 Meera is 12 years old. Kabir is older than Meera. How old is Kabir? (a) 17 (b) 14 (c) 13 (d) not enough info
36. 36.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) 50 (c) not enough info (d) 10
37. 37.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
38. 38.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 11 (c) 30 (d) 35
39. 39.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
40. 40.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

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