Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 707 · 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? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
8. 8.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
9. 9.🧩 Aarav bought 5 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹45 (c) not enough info (d) ₹200
10. 10.🧩 Kabir bought 4 notebooks and a bag for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹176 (b) ₹180 (c) ₹45 (d) not enough info
11. 11.🧩 Tara bought 6 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) ₹20 (c) not enough info (d) ₹25
12. 12.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 32 (b) 36 (c) not enough info (d) 12
13. 13.🧩 Diya is 6 years old. Arjun is 6 years older than Diya. How old is Arjun? (a) 12 (b) not enough info (c) 6 (d) 13
14. 14.🧩 A box has 8 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 14 (b) 48 (c) not enough info (d) 54
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
16. 16.🥭 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, it is certain (c) no, check more (d) yes, mangoes match
17. 17.🧩 Diya bought 6 balls and a bag for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) ₹33 (c) ₹194 (d) not enough info
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Kabir is 10 years old. Rohan is older than Kabir. How old is Rohan? (a) 11 (b) not enough info (c) 15 (d) 12
21. 21.🧩 Aarav bought 4 notebooks and a water bottle for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹110 (b) ₹27 (c) not enough info (d) ₹106
22. 22.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
23. 23.🧩 Saanvi bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) ₹15 (c) ₹20 (d) not enough info
24. 24.🧩 Ananya bought 2 notebooks and a cap for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹108 (b) ₹55 (c) not enough info (d) ₹110
25. 25.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 12 (b) 42 (c) not enough info (d) 36
26. 26.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 5 PM
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
28. 28.🧩 A box has 5 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 13 (d) 48
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Saanvi is 9 years old. Arjun is older than Saanvi. How old is Arjun? (a) 10 (b) 11 (c) 14 (d) not enough info
32. 32.🧩 Aarav bought 2 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) ₹20 (c) not enough info (d) ₹15
33. 33.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 63 (d) 72
34. 34.🧩 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
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
36. 36.🧩 Arjun bought 3 pens and a water bottle for ₹205 in all. Each pen cost the same. What did one pen cost? (a) ₹68 (b) ₹205 (c) not enough info (d) ₹202
37. 37.🧩 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
38. 38.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
39. 39.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False

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