Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 548 · 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.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
2. 2.🧩 Rohan is 9 years old. Arjun is older than Rohan. How old is Arjun? (a) 14 (b) not enough info (c) 10 (d) 11
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
5. 5.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
6. 6.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
7. 7.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Ananya is 10 years old. Aarav is older than Ananya. How old is Aarav? (a) 15 (b) not enough info (c) 12 (d) 11
9. 9.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
10. 10.🧩 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
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
13. 13.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
14. 14.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
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.🧩 Tara bought 5 balls for ₹125 in all. Each ball cost the same. What did one ball cost? (a) ₹125 (b) ₹25 (c) not enough info (d) ₹30
17. 17.🧩 Aarav bought 6 mangoes and a bag for ₹340 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹56 (c) ₹340 (d) ₹334
18. 18.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
19. 19.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 9 (b) not enough info (c) 90 (d) 18
22. 22.🧩 Arjun is 7 years old. Ishaan is 7 years older than Arjun. How old is Ishaan? (a) 15 (b) not enough info (c) 14 (d) 7
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.🧩 Saanvi bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) ₹65 (c) ₹60 (d) not enough info
25. 25.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
26. 26.🧩 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
27. 27.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 12 (b) not enough info (c) 6 (d) 60
28. 28.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
30. 30.🧩 Saanvi is 11 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 12 (b) 16 (c) 13 (d) not enough info
31. 31.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 10 PM (d) 6 PM
32. 32.🧩 Arjun bought 3 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹25 (c) ₹20 (d) not enough info
33. 33.🥭 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) yes, mangoes match (c) no, check more (d) yes, it is certain
34. 34.🧩 Rohan is 6 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 8 (b) not enough info (c) 11 (d) 7
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Saanvi is 9 years old. Rohan is older than Saanvi. How old is Rohan? (a) 11 (b) 10 (c) not enough info (d) 14
37. 37.🧩 Tara bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹55 (d) ₹165
38. 38.🧩 Ishaan is 10 years old. Nisha is older than Ishaan. How old is Nisha? (a) 15 (b) 11 (c) 12 (d) not enough info
39. 39.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
40. 40.🧩 Kabir is 10 years old. Meera is 5 years older than Kabir. How old is Meera? (a) 15 (b) 5 (c) 16 (d) not enough info

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