Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 517 · 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) not enough evidence (b) enough evidence
2. 2.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
3. 3.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 4 PM (d) not enough info
4. 4.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
5. 5.🧩 Tara bought 6 balls for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) not enough info (c) ₹240 (d) ₹45
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
8. 8.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
9. 9.🧩 Ananya is 7 years old. Arjun is 2 years older than Ananya. How old is Arjun? (a) 10 (b) 2 (c) not enough info (d) 9
10. 10.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 70 (b) not enough info (c) 7 (d) 14
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
12. 12.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
13. 13.🧩 Vihaan bought 2 balls for ₹20 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹10 (c) ₹20 (d) ₹15
14. 14.🧩 Meera is 12 years old. Ananya is 9 years older than Meera. How old is Ananya? (a) 21 (b) 22 (c) 9 (d) not enough info
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
17. 17.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
18. 18.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
19. 19.🧩 Meera is 12 years old. Aarav is 2 years older than Meera. How old is Aarav? (a) not enough info (b) 2 (c) 15 (d) 14
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
21. 21.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
24. 24.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 9 PM
25. 25.🧩 Saanvi bought 5 markers and a cap for ₹295 in all. Each marker cost the same. What did one marker cost? (a) ₹59 (b) ₹290 (c) not enough info (d) ₹295
26. 26.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) for fun only (d) to waste time
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 8 PM
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Aarav is 6 years old. Tara is 3 years older than Aarav. How old is Tara? (a) not enough info (b) 3 (c) 9 (d) 10
31. 31.🧩 Vihaan bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹65 (b) not enough info (c) ₹120 (d) ₹60
32. 32.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
33. 33.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 10 (b) 25 (c) not enough info (d) 30
34. 34.🧩 Kabir bought 3 pens and a bag for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹87 (b) not enough info (c) ₹90 (d) ₹30
35. 35.🧩 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
36. 36.🧩 Aarav is 9 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 14 (b) 10 (c) not enough info (d) 11
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
38. 38.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
39. 39.🥭 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) yes, mangoes match (d) no mango is sweet
40. 40.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 6 PM

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