Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 264 · 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 tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
2. 2.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
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
5. 5.🥭 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
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
7. 7.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
8. 8.🧩 Saanvi bought 3 kites and a water bottle for ₹145 in all. Each kite cost the same. What did one kite cost? (a) ₹145 (b) ₹48 (c) ₹142 (d) not enough info
9. 9.🧩 Arjun is 9 years old. Vihaan is 4 years older than Arjun. How old is Vihaan? (a) not enough info (b) 13 (c) 4 (d) 14
10. 10.🧩 Diya is 7 years old. Tara is older than Diya. How old is Tara? (a) 9 (b) 12 (c) 8 (d) not enough info
11. 11.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
12. 12.🧩 Rohan bought 6 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹120 (b) ₹25 (c) ₹20 (d) not enough info
13. 13.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
17. 17.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
18. 18.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 12 (b) not enough info (c) 27 (d) 36
19. 19.🧩 Vihaan is 6 years old. Tara is 9 years older than Vihaan. How old is Tara? (a) not enough info (b) 9 (c) 15 (d) 16
20. 20.🧩 Kabir bought 4 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹200 (b) ₹55 (c) not enough info (d) ₹50
21. 21.🧩 Diya bought 5 balls and a water bottle for ₹390 in all. Each ball cost the same. What did one ball cost? (a) ₹78 (b) not enough info (c) ₹385 (d) ₹390
22. 22.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
23. 23.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
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.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
27. 27.🧩 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
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
31. 31.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
32. 32.🧩 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
33. 33.🧩 Ananya is 9 years old. Meera is 2 years older than Ananya. How old is Meera? (a) not enough info (b) 11 (c) 2 (d) 12
34. 34.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
36. 36.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
37. 37.🧩 Kabir is 6 years old. Vihaan is older than Kabir. How old is Vihaan? (a) 7 (b) not enough info (c) 8 (d) 11
38. 38.🧩 Vihaan bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹30 (c) not enough info (d) ₹100
39. 39.🧩 Rohan bought 5 mangoes and a water bottle for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹295 (b) ₹60 (c) not enough info (d) ₹300
40. 40.🧩 Ishaan bought 3 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹30 (c) ₹10 (d) not enough info

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