Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 672 · 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.🧩 Arjun is 7 years old. Tara is 6 years older than Arjun. How old is Tara? (a) 13 (b) 6 (c) not enough info (d) 14
2. 2.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) 6 PM (d) not enough info
3. 3.🧩 Arjun is 10 years old. Ananya is 3 years older than Arjun. How old is Ananya? (a) 13 (b) 3 (c) 14 (d) not enough info
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
5. 5.🧩 Tara bought 4 pens for ₹220 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹55 (c) ₹220 (d) not enough info
6. 6.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
7. 7.🧩 Aarav is 6 years old. Diya is older than Aarav. How old is Diya? (a) not enough info (b) 7 (c) 8 (d) 11
8. 8.🧩 Kabir bought 2 kites and a bag for ₹120 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹118 (c) ₹120 (d) ₹60
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
13. 13.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
14. 14.🧩 Vihaan is 6 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) 11 (b) 7 (c) not enough info (d) 8
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
17. 17.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 8 (c) 40 (d) 4
18. 18.🥭 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) yes, mangoes match (d) no mango is sweet
19. 19.🧩 Kabir bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹70 (b) ₹40 (c) ₹35 (d) not enough info
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
23. 23.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 9 PM (c) 5 PM (d) not enough info
24. 24.📊 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
25. 25.🧩 Vihaan bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹30
26. 26.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
28. 28.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
29. 29.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
30. 30.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
31. 31.🧩 Ishaan bought 2 pens and a bag for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹100 (b) ₹50 (c) ₹98 (d) not enough info
32. 32.🧩 Rohan is 7 years old. Kabir is 3 years older than Rohan. How old is Kabir? (a) 11 (b) 3 (c) 10 (d) not enough info
33. 33.🧩 Vihaan is 11 years old. Aarav is 8 years older than Vihaan. How old is Aarav? (a) not enough info (b) 20 (c) 19 (d) 8
34. 34.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
35. 35.🧩 A box has 7 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 64 (b) 15 (c) not enough info (d) 56
36. 36.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Nisha is 11 years old. Kabir is older than Nisha. How old is Kabir? (a) 16 (b) 13 (c) 12 (d) not enough info
38. 38.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Kabir is 6 years old. Ananya is 2 years older than Kabir. How old is Ananya? (a) 2 (b) not enough info (c) 9 (d) 8
40. 40.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 2 PM

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