Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 742 · 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.📊 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
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
3. 3.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 5 PM (c) 7 PM (d) not enough info
4. 4.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 8 (b) 20 (c) 16 (d) not enough info
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
7. 7.🥭 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) no, check more (c) yes, it is certain (d) yes, mangoes match
8. 8.🧩 Ananya is 7 years old. Meera is older than Ananya. How old is Meera? (a) 8 (b) 9 (c) 12 (d) not enough info
9. 9.🧩 Nisha bought 6 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹20 (c) ₹120 (d) not enough info
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
12. 12.🧩 Ishaan is 6 years old. Ananya is older than Ishaan. How old is Ananya? (a) 7 (b) not enough info (c) 11 (d) 8
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
14. 14.🧩 A box has 4 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 11 (b) 28 (c) 35 (d) not enough info
15. 15.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
16. 16.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
17. 17.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
18. 18.🧩 A box has 3 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 12 (b) 16 (c) not enough info (d) 7
19. 19.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
20. 20.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Arjun is 11 years old. Rohan is 8 years older than Arjun. How old is Rohan? (a) 8 (b) 20 (c) not enough info (d) 19
22. 22.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
23. 23.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
24. 24.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
26. 26.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
27. 27.🧩 A box has 7 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 12 (b) 40 (c) not enough info (d) 35
28. 28.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
29. 29.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
30. 30.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
31. 31.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
32. 32.🧩 Nisha bought 2 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹45 (c) not enough info (d) ₹80
33. 33.🧩 A box has 4 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 32 (c) 40 (d) 12
34. 34.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
35. 35.🧩 Meera bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) ₹40 (d) not enough info
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
37. 37.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
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Saanvi 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
40. 40.🧩 Aarav bought 3 notebooks and a cap for ₹195 in all. Each notebook cost the same. What did one notebook cost? (a) ₹195 (b) not enough info (c) ₹192 (d) ₹65

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