Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 119 · 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 tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
2. 2.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
5. 5.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
6. 6.🧩 Ananya bought 6 kites and a water bottle for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹214 (b) not enough info (c) ₹36 (d) ₹220
7. 7.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
8. 8.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
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
11. 11.🧩 Rohan is 10 years old. Kabir is older than Rohan. How old is Kabir? (a) 15 (b) not enough info (c) 12 (d) 11
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Kabir is 10 years old. Meera is 8 years older than Kabir. How old is Meera? (a) 8 (b) not enough info (c) 18 (d) 19
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
15. 15.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Saanvi bought 4 kites and a bag for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) not enough info (c) ₹176 (d) ₹180
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
19. 19.🧩 A box has 4 rows of apples, with 5 in each row. How many apples are in the box? (a) 9 (b) 25 (c) 20 (d) not enough info
20. 20.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 36 (d) 32
21. 21.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 5 PM
22. 22.🧩 Saanvi bought 6 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹45 (c) ₹240 (d) not enough info
23. 23.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
24. 24.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
26. 26.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
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Vihaan bought 6 notebooks and a water bottle for ₹320 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹320 (c) ₹314 (d) ₹53
29. 29.🧩 Vihaan is 8 years old. Nisha is older than Vihaan. How old is Nisha? (a) not enough info (b) 9 (c) 13 (d) 10
30. 30.🧩 A box has 6 rows of apples, with 8 in each row. How many apples are in the box? (a) 56 (b) 14 (c) not enough info (d) 48
31. 31.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 2 PM
32. 32.🧩 Nisha bought 4 mangoes and a bag for ₹330 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹326 (c) ₹330 (d) ₹82
33. 33.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 9 PM (c) not enough info (d) 6 PM
34. 34.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 48 (b) not enough info (c) 40 (d) 13
35. 35.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
36. 36.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) for fun only (d) to change answers
37. 37.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
38. 38.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
40. 40.🧩 Rohan bought 2 markers and a bag for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹58 (b) not enough info (c) ₹60 (d) ₹30

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