Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 70 · 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.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
4. 4.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
5. 5.🧩 Diya bought 5 notebooks and a water bottle for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹140 (b) ₹135 (c) not enough info (d) ₹28
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
7. 7.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
8. 8.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
9. 9.🧩 Rohan is 11 years old. Ishaan is older than Rohan. How old is Ishaan? (a) 13 (b) 12 (c) not enough info (d) 16
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
11. 11.🧩 Kabir is 11 years old. Tara is older than Kabir. How old is Tara? (a) 16 (b) 12 (c) 13 (d) not enough info
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
14. 14.🧩 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
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
16. 16.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 2 PM (d) 5 PM
17. 17.🐕 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
18. 18.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
20. 20.🧩 Aarav is 7 years old. Arjun is 2 years older than Aarav. How old is Arjun? (a) not enough info (b) 9 (c) 2 (d) 10
21. 21.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Tara is 11 years old. Rohan is 3 years older than Tara. How old is Rohan? (a) not enough info (b) 14 (c) 3 (d) 15
23. 23.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
24. 24.🥭 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) no mango is sweet (d) yes, it is certain
25. 25.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
26. 26.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 3 PM (c) 4 PM (d) not enough info
27. 27.🧩 A box has 7 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 15 (c) 56 (d) 64
28. 28.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 8 PM
29. 29.🧩 Tara is 10 years old. Kabir is 4 years older than Tara. How old is Kabir? (a) 15 (b) not enough info (c) 14 (d) 4
30. 30.🧩 Arjun bought 3 mangoes for ₹165 in all. Each mango cost the same. What did one mango cost? (a) ₹165 (b) ₹60 (c) ₹55 (d) not enough info
31. 31.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
32. 32.🧩 Tara bought 4 markers for ₹200 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹200 (c) ₹55 (d) ₹50
33. 33.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 36 (b) 27 (c) not enough info (d) 12
34. 34.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
35. 35.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
36. 36.🧩 Tara bought 6 pens and a lunch box for ₹440 in all. Each pen cost the same. What did one pen cost? (a) ₹440 (b) not enough info (c) ₹434 (d) ₹73
37. 37.🧩 Arjun is 9 years old. Saanvi is 4 years older than Arjun. How old is Saanvi? (a) 4 (b) not enough info (c) 13 (d) 14
38. 38.🧩 A box has 6 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 13 (b) not enough info (c) 42 (d) 49
39. 39.🧩 Kabir is 6 years old. Meera is 3 years older than Kabir. How old is Meera? (a) 3 (b) 9 (c) 10 (d) not enough info
40. 40.🧩 Aarav bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹135 (d) ₹50

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