Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 830 · 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.🧩 Ishaan bought 3 markers and a bag for ₹215 in all. Each marker cost the same. What did one marker cost? (a) ₹212 (b) ₹215 (c) not enough info (d) ₹71
2. 2.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
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
4. 4.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
5. 5.🥭 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, mangoes match (c) yes, it is certain (d) no, check more
6. 6.🧩 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
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
9. 9.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 2 PM
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
12. 12.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
13. 13.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
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
15. 15.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
16. 16.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
17. 17.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 4 PM
18. 18.🧩 Ananya bought 3 pens and a water bottle for ₹175 in all. Each pen cost the same. What did one pen cost? (a) ₹58 (b) ₹172 (c) ₹175 (d) not enough info
19. 19.🧩 Ananya bought 5 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹150 (b) ₹30 (c) not enough info (d) ₹35
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
21. 21.🧩 Kabir is 11 years old. Vihaan is older than Kabir. How old is Vihaan? (a) 13 (b) 16 (c) 12 (d) not enough info
22. 22.🧩 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
23. 23.🧩 Vihaan is 12 years old. Aarav is older than Vihaan. How old is Aarav? (a) not enough info (b) 17 (c) 14 (d) 13
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
25. 25.🧩 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
26. 26.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 2 PM
27. 27.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
28. 28.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) 48 (b) 13 (c) not enough info (d) 42
29. 29.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 35 (d) 40
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
31. 31.🧩 Nisha bought 3 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) not enough info (c) ₹60 (d) ₹180
32. 32.🧩 Tara is 11 years old. Kabir is older than Tara. How old is Kabir? (a) 12 (b) 13 (c) 16 (d) not enough info
33. 33.🧩 Ananya is 7 years old. Rohan is 5 years older than Ananya. How old is Rohan? (a) 5 (b) not enough info (c) 13 (d) 12
34. 34.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 3 PM
35. 35.🧩 Vihaan bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹180
36. 36.🧩 Nisha bought 5 mangoes and a water bottle for ₹105 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) ₹21 (c) ₹105 (d) not enough info
37. 37.🧩 Arjun bought 3 pens and a water bottle for ₹195 in all. Each pen cost the same. What did one pen cost? (a) ₹192 (b) ₹65 (c) not enough info (d) ₹195
38. 38.🧩 A box has 3 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 24 (c) 32 (d) 11
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True

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