Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 224 · 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.🧩 Saanvi bought 2 pens and a water bottle for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹98 (b) ₹100 (c) ₹50 (d) not enough info
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
3. 3.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
6. 6.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
7. 7.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
8. 8.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 9 PM (d) 8 PM
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
11. 11.🧩 A box has 4 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 20 (d) 25
12. 12.🧩 Meera bought 2 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹25 (c) not enough info (d) ₹30
13. 13.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 70 (b) 7 (c) not enough info (d) 14
14. 14.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
15. 15.🧩 Nisha bought 2 markers and a lunch box for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹158 (b) ₹160 (c) not enough info (d) ₹80
16. 16.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
17. 17.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) yes, mangoes match (d) no, check more
18. 18.🧩 Arjun is 11 years old. Ishaan is older than Arjun. How old is Ishaan? (a) not enough info (b) 16 (c) 12 (d) 13
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
22. 22.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 8 PM
23. 23.🧩 Arjun bought 5 notebooks and a water bottle for ₹95 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹19 (c) ₹95 (d) ₹90
24. 24.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
26. 26.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) not enough info (c) 40 (d) 8
27. 27.🧩 Tara bought 3 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) not enough info (c) ₹75 (d) ₹25
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
30. 30.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
31. 31.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 25 (b) 30 (c) 10 (d) not enough info
32. 32.🧩 Vihaan bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹60
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Vihaan is 12 years old. Aarav is older than Vihaan. How old is Aarav? (a) 14 (b) not enough info (c) 17 (d) 13
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
37. 37.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
39. 39.🧩 Meera is 11 years old. Diya is older than Meera. How old is Diya? (a) 12 (b) not enough info (c) 13 (d) 16
40. 40.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 7 PM

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids