Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 958 · 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 measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
2. 2.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
9. 9.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
11. 11.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
12. 12.🧩 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
13. 13.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
14. 14.🧩 Vihaan bought 2 balls for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹110 (b) ₹60 (c) not enough info (d) ₹55
15. 15.🧩 Meera bought 4 notebooks and a water bottle for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹236 (d) ₹240
16. 16.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
17. 17.🧩 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
18. 18.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
19. 19.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
21. 21.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
25. 25.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
26. 26.🧩 Kabir bought 5 markers and a bag for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹165 (b) ₹34 (c) not enough info (d) ₹170
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
29. 29.🧩 Nisha bought 3 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹50 (c) ₹150 (d) not enough info
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
31. 31.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
32. 32.🥭 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, mangoes match (c) yes, it is certain (d) no mango is sweet
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
34. 34.🧩 A box has 8 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 72 (c) 17 (d) 81
35. 35.🧩 Ananya is 6 years old. Ishaan is 4 years older than Ananya. How old is Ishaan? (a) 4 (b) 10 (c) not enough info (d) 11
36. 36.🧩 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
37. 37.🧩 Diya bought 3 balls and a water bottle for ₹245 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹81 (c) ₹242 (d) ₹245
38. 38.🧩 Aarav is 6 years old. Arjun is 2 years older than Aarav. How old is Arjun? (a) 2 (b) not enough info (c) 9 (d) 8
39. 39.🧩 Meera bought 6 kites and a water bottle for ₹330 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹55 (c) ₹324 (d) ₹330
40. 40.🧩 Arjun is 8 years old. Tara is 4 years older than Arjun. How old is Tara? (a) not enough info (b) 13 (c) 4 (d) 12

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