Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 899 · 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.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
2. 2.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
3. 3.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
4. 4.🧩 Vihaan is 8 years old. Meera is 8 years older than Vihaan. How old is Meera? (a) 17 (b) 16 (c) not enough info (d) 8
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
7. 7.🧩 Diya bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) ₹65 (c) not enough info (d) ₹60
8. 8.🧩 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
9. 9.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
10. 10.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
11. 11.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 45 (b) not enough info (c) 13 (d) 40
12. 12.🧩 Diya bought 4 pens and a bag for ₹310 in all. Each pen cost the same. What did one pen cost? (a) ₹306 (b) ₹77 (c) ₹310 (d) not enough info
13. 13.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
14. 14.🧩 Diya bought 3 mangoes and a cap for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹110 (b) ₹36 (c) ₹107 (d) not enough info
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
17. 17.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
19. 19.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Ananya is 9 years old. Vihaan is older than Ananya. How old is Vihaan? (a) 10 (b) not enough info (c) 11 (d) 14
25. 25.🧩 Rohan is 7 years old. Ananya is older than Rohan. How old is Ananya? (a) 9 (b) 12 (c) 8 (d) not enough info
26. 26.🧩 Meera bought 3 mangoes and a lunch box for ₹115 in all. Each mango cost the same. What did one mango cost? (a) ₹115 (b) not enough info (c) ₹112 (d) ₹38
27. 27.🧩 Vihaan bought 4 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹20 (c) not enough info (d) ₹25
28. 28.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 7 PM
29. 29.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 2 PM
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
33. 33.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 5 PM
34. 34.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
36. 36.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
37. 37.🧩 Vihaan bought 5 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) not enough info (c) ₹300 (d) ₹65
38. 38.🧩 Diya is 7 years old. Kabir is older than Diya. How old is Kabir? (a) 8 (b) not enough info (c) 12 (d) 9
39. 39.🧩 Arjun is 11 years old. Vihaan is 3 years older than Arjun. How old is Vihaan? (a) not enough info (b) 14 (c) 15 (d) 3
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False

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