Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 861 · 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.🧩 Aarav is 8 years old. Diya is 3 years older than Aarav. How old is Diya? (a) 11 (b) 12 (c) 3 (d) not enough info
2. 2.🧩 Kabir bought 5 pens and a bag for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹145 (b) ₹150 (c) not enough info (d) ₹30
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
6. 6.🧩 Rohan is 10 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 11 (b) not enough info (c) 12 (d) 15
7. 7.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 3 PM
8. 8.🧩 Vihaan bought 5 pens and a water bottle for ₹325 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) ₹320 (c) ₹325 (d) not enough info
9. 9.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
11. 11.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
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, mangoes match (b) yes, it is certain (c) no, check more (d) no mango is sweet
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Diya bought 4 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) not enough info (c) ₹20 (d) ₹25
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
19. 19.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 7 PM
20. 20.🧩 Tara bought 6 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹20 (c) not enough info (d) ₹15
21. 21.🧩 Ishaan bought 5 kites for ₹50 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹50
22. 22.🧩 Aarav is 7 years old. Meera is 6 years older than Aarav. How old is Meera? (a) 14 (b) not enough info (c) 13 (d) 6
23. 23.🧩 A box has 6 rows of oranges, with 7 in each row. How many oranges are in the box? (a) not enough info (b) 49 (c) 42 (d) 13
24. 24.🧩 Kabir bought 6 notebooks for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹330
25. 25.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
26. 26.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) not enough info (b) 70 (c) 14 (d) 7
27. 27.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
29. 29.🧩 Diya bought 3 kites and a bag for ₹195 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) ₹192 (c) ₹195 (d) not enough info
30. 30.🧩 Rohan bought 6 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹120 (c) ₹20 (d) ₹25
31. 31.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
32. 32.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 3 PM
33. 33.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
34. 34.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
35. 35.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Arjun is 7 years old. Aarav is older than Arjun. How old is Aarav? (a) 8 (b) not enough info (c) 12 (d) 9
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Vihaan bought 4 pens and a lunch box for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹240 (b) not enough info (c) ₹60 (d) ₹236
39. 39.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
40. 40.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

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