Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 564 · 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.🧩 Kabir bought 3 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹10 (c) ₹30 (d) ₹15
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 16 (b) 63 (c) 72 (d) not enough info
6. 6.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
7. 7.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Kabir bought 6 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹150 (c) ₹25 (d) ₹30
9. 9.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 2 PM (d) 4 PM
10. 10.🧩 Diya is 8 years old. Meera is 5 years older than Diya. How old is Meera? (a) not enough info (b) 5 (c) 14 (d) 13
11. 11.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 9 PM
13. 13.🧩 Vihaan is 8 years old. Tara is older than Vihaan. How old is Tara? (a) 10 (b) 9 (c) 13 (d) not enough info
14. 14.🧩 Arjun is 8 years old. Kabir is 7 years older than Arjun. How old is Kabir? (a) not enough info (b) 7 (c) 16 (d) 15
15. 15.🧩 Ananya is 11 years old. Saanvi is 6 years older than Ananya. How old is Saanvi? (a) 6 (b) 18 (c) not enough info (d) 17
16. 16.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
17. 17.🧩 Meera is 11 years old. Rohan is 2 years older than Meera. How old is Rohan? (a) not enough info (b) 14 (c) 2 (d) 13
18. 18.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 7 PM
19. 19.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
20. 20.🧩 Diya is 10 years old. Nisha is older than Diya. How old is Nisha? (a) not enough info (b) 12 (c) 11 (d) 15
21. 21.🧩 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
22. 22.🧩 Diya is 10 years old. Ananya is older than Diya. How old is Ananya? (a) not enough info (b) 12 (c) 15 (d) 11
23. 23.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
24. 24.🧩 Ishaan bought 5 balls and a cap for ₹285 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹285 (c) ₹280 (d) ₹57
25. 25.🧩 Saanvi bought 2 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) not enough info (c) ₹45 (d) ₹50
26. 26.🧩 Vihaan bought 4 notebooks and a water bottle for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹37 (b) ₹146 (c) ₹150 (d) not enough info
27. 27.🧩 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
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
29. 29.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
30. 30.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
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
33. 33.🧩 Vihaan bought 5 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹20 (c) ₹15 (d) not enough info
34. 34.🧩 Rohan is 12 years old. Diya is 7 years older than Rohan. How old is Diya? (a) not enough info (b) 19 (c) 20 (d) 7
35. 35.🧩 Nisha bought 3 mangoes and a bag for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹46 (b) ₹137 (c) ₹140 (d) not enough info
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Diya bought 5 pens and a cap for ₹125 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹120 (c) ₹125 (d) ₹25
38. 38.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
39. 39.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 4 PM
40. 40.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info

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