Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 485 · 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.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
2. 2.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
4. 4.🧩 Kabir is 6 years old. Arjun is 8 years older than Kabir. How old is Arjun? (a) not enough info (b) 15 (c) 8 (d) 14
5. 5.🧩 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
6. 6.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 3 PM (d) 4 PM
7. 7.🧩 Rohan bought 6 mangoes and a bag for ₹320 in all. Each mango cost the same. What did one mango cost? (a) ₹53 (b) ₹320 (c) ₹314 (d) not enough info
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
10. 10.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
11. 11.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) 60 (c) not enough info (d) 12
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
14. 14.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
17. 17.🧩 Arjun is 11 years old. Ishaan is 5 years older than Arjun. How old is Ishaan? (a) 16 (b) not enough info (c) 17 (d) 5
18. 18.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
19. 19.🧩 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
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
21. 21.🧩 A box has 4 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 30 (b) not enough info (c) 24 (d) 10
22. 22.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
23. 23.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
24. 24.🧩 Meera bought 4 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹60 (c) ₹20 (d) not enough info
25. 25.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 7 PM
26. 26.🧩 Rohan bought 4 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹50 (c) not enough info (d) ₹200
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
29. 29.🧩 Arjun is 12 years old. Tara is older than Arjun. How old is Tara? (a) 13 (b) not enough info (c) 17 (d) 14
30. 30.🧩 Saanvi is 10 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 11 (b) 15 (c) 12 (d) not enough info
31. 31.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
32. 32.🥭 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) no, check more (c) yes, it is certain (d) no mango is sweet
33. 33.🧩 Vihaan bought 6 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹300 (d) ₹55
34. 34.🧩 Kabir bought 6 markers for ₹210 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹210 (c) ₹35 (d) ₹40
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.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
37. 37.🧩 Ananya bought 5 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹50 (c) not enough info (d) ₹10
38. 38.🧩 Saanvi bought 6 notebooks and a cap for ₹350 in all. Each notebook cost the same. What did one notebook cost? (a) ₹350 (b) ₹344 (c) not enough info (d) ₹58
39. 39.🧩 Tara bought 2 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹65
40. 40.🧩 Diya is 9 years old. Aarav is 6 years older than Diya. How old is Aarav? (a) 15 (b) not enough info (c) 6 (d) 16

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