Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 474 · 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.🧩 Rohan bought 3 markers and a water bottle for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹237 (b) ₹80 (c) ₹240 (d) not enough info
2. 2.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
3. 3.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
4. 4.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
5. 5.🐕 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
6. 6.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
7. 7.🧩 Aarav bought 5 balls and a cap for ₹95 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) ₹95 (c) ₹19 (d) not enough info
8. 8.🧩 A box has 3 rows of oranges, with 4 in each row. How many oranges are in the box? (a) not enough info (b) 16 (c) 12 (d) 7
9. 9.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 3 PM
10. 10.🧩 Meera bought 5 markers and a cap for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹220 (b) ₹44 (c) ₹215 (d) not enough info
11. 11.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
12. 12.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 6 (d) 60
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Diya bought 4 kites and a water bottle for ₹270 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹67 (c) ₹266 (d) ₹270
16. 16.🧩 Diya bought 6 mangoes and a cap for ₹350 in all. Each mango cost the same. What did one mango cost? (a) ₹350 (b) ₹58 (c) not enough info (d) ₹344
17. 17.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
19. 19.🧩 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
20. 20.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) not enough info (c) 90 (d) 9
21. 21.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
22. 22.🧩 Kabir is 6 years old. Ananya is older than Kabir. How old is Ananya? (a) not enough info (b) 7 (c) 11 (d) 8
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Arjun is 10 years old. Kabir is older than Arjun. How old is Kabir? (a) 12 (b) not enough info (c) 11 (d) 15
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
26. 26.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
27. 27.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 4 PM
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
29. 29.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
30. 30.🧩 Aarav is 11 years old. Meera is older than Aarav. How old is Meera? (a) 16 (b) 13 (c) 12 (d) not enough info
31. 31.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 15 (b) not enough info (c) 63 (d) 54
32. 32.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 6 PM
33. 33.🧩 Saanvi bought 2 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹80 (c) ₹45 (d) ₹40
34. 34.🧩 Meera bought 2 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹50 (c) ₹100 (d) ₹55
35. 35.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Saanvi is 7 years old. Nisha is 8 years older than Saanvi. How old is Nisha? (a) 15 (b) 16 (c) not enough info (d) 8
37. 37.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
38. 38.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 4 PM
39. 39.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False

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