Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 212 · 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.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
4. 4.🐕 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
5. 5.🧩 Tara bought 5 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹100
6. 6.🧩 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
7. 7.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
8. 8.🧩 Saanvi is 7 years old. Ananya is older than Saanvi. How old is Ananya? (a) 8 (b) not enough info (c) 9 (d) 12
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
10. 10.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
12. 12.🥭 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) no, check more (c) no mango is sweet (d) yes, mangoes match
13. 13.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
14. 14.🧩 Nisha bought 2 notebooks and a bag for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹65 (c) ₹128 (d) ₹130
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
16. 16.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 3 PM (c) not enough info (d) 6 PM
17. 17.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) 7 (c) not enough info (d) 12
18. 18.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) not enough info (c) 20 (d) 9
19. 19.🧩 Ananya is 11 years old. Diya is older than Ananya. How old is Diya? (a) 16 (b) not enough info (c) 12 (d) 13
20. 20.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
21. 21.🧩 Aarav is 7 years old. Rohan is 7 years older than Aarav. How old is Rohan? (a) 15 (b) 7 (c) 14 (d) not enough info
22. 22.🧩 Ananya bought 5 markers and a water bottle for ₹370 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹74 (c) ₹370 (d) ₹365
23. 23.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
24. 24.🧩 Meera is 6 years old. Rohan is 9 years older than Meera. How old is Rohan? (a) 9 (b) not enough info (c) 16 (d) 15
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
27. 27.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 63 (b) 54 (c) 15 (d) not enough info
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Diya bought 4 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹180 (b) not enough info (c) ₹50 (d) ₹45
30. 30.🧩 Rohan bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹125 (b) ₹30 (c) not enough info (d) ₹25
31. 31.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 5 PM
32. 32.🧩 Saanvi is 11 years old. Tara is older than Saanvi. How old is Tara? (a) 12 (b) 13 (c) not enough info (d) 16
33. 33.🧩 A box has 8 rows of apples, with 6 in each row. How many apples are in the box? (a) 14 (b) 54 (c) not enough info (d) 48
34. 34.🧩 Aarav is 11 years old. Tara is older than Aarav. How old is Tara? (a) 12 (b) 16 (c) 13 (d) not enough info
35. 35.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
36. 36.🧩 Tara bought 6 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹90 (b) ₹20 (c) not enough info (d) ₹15
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
38. 38.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
39. 39.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
40. 40.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence

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