Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 362 · 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.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 8 PM
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
4. 4.🧩 Vihaan bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹45 (c) ₹225 (d) not enough info
5. 5.📊 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
6. 6.🧩 Kabir is 12 years old. Tara is 9 years older than Kabir. How old is Tara? (a) not enough info (b) 9 (c) 22 (d) 21
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, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
10. 10.🧩 Aarav bought 4 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹32 (b) ₹126 (c) not enough info (d) ₹130
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
14. 14.🧩 Vihaan bought 5 mangoes and a lunch box for ₹185 in all. Each mango cost the same. What did one mango cost? (a) ₹185 (b) not enough info (c) ₹180 (d) ₹37
15. 15.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
16. 16.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
17. 17.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
18. 18.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
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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
21. 21.🧩 A box has 7 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 40 (b) 35 (c) not enough info (d) 12
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
23. 23.🧩 Rohan is 9 years old. Nisha is 4 years older than Rohan. How old is Nisha? (a) 4 (b) 14 (c) 13 (d) not enough info
24. 24.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box has 5 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 13 (d) 48
28. 28.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) 13 (b) not enough info (c) 48 (d) 42
29. 29.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 5 PM
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Tara bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹60 (c) not enough info (d) ₹110
32. 32.🧩 Aarav is 7 years old. Ishaan is older than Aarav. How old is Ishaan? (a) 8 (b) 12 (c) not enough info (d) 9
33. 33.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 40 (d) 4
34. 34.🧩 Tara is 10 years old. Rohan is 7 years older than Tara. How old is Rohan? (a) 17 (b) 18 (c) 7 (d) not enough info
35. 35.🧩 Tara bought 5 markers and a cap for ₹190 in all. Each marker cost the same. What did one marker cost? (a) ₹38 (b) ₹190 (c) ₹185 (d) not enough info
36. 36.🧩 Arjun is 10 years old. Vihaan is older than Arjun. How old is Vihaan? (a) 11 (b) 15 (c) not enough info (d) 12
37. 37.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
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
39. 39.🧩 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
40. 40.🧩 Aarav is 7 years old. Kabir is older than Aarav. How old is Kabir? (a) 12 (b) not enough info (c) 8 (d) 9

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