Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 439 · 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 asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
3. 3.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) not enough info (b) 4 (c) 8 (d) 40
4. 4.🧩 Diya bought 6 balls and a bag for ₹410 in all. Each ball cost the same. What did one ball cost? (a) ₹68 (b) ₹404 (c) not enough info (d) ₹410
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Kabir bought 6 notebooks and a lunch box for ₹380 in all. Each notebook cost the same. What did one notebook cost? (a) ₹374 (b) ₹63 (c) ₹380 (d) not enough info
7. 7.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
8. 8.🧩 Rohan is 11 years old. Arjun is 5 years older than Rohan. How old is Arjun? (a) not enough info (b) 5 (c) 16 (d) 17
9. 9.🧩 Meera bought 3 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) ₹65 (c) ₹60 (d) not enough info
10. 10.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 4 PM
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
13. 13.🧩 Ishaan bought 4 kites for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹160 (c) not enough info (d) ₹40
14. 14.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 9 PM (c) 10 PM (d) not enough info
15. 15.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
16. 16.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
18. 18.🧩 Ishaan is 8 years old. Ananya is 8 years older than Ishaan. How old is Ananya? (a) 8 (b) 17 (c) not enough info (d) 16
19. 19.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
21. 21.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
22. 22.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
23. 23.🥭 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
24. 24.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 9 (c) 90 (d) 18
25. 25.🧩 Saanvi is 7 years old. Ananya is 3 years older than Saanvi. How old is Ananya? (a) not enough info (b) 3 (c) 11 (d) 10
26. 26.🧩 Vihaan bought 3 mangoes and a bag for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹25 (c) not enough info (d) ₹72
27. 27.🧩 Ananya is 7 years old. Diya is 3 years older than Ananya. How old is Diya? (a) not enough info (b) 3 (c) 10 (d) 11
28. 28.🧩 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
29. 29.🧩 Vihaan bought 2 mangoes and a water bottle for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹88 (b) ₹90 (c) not enough info (d) ₹45
30. 30.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
32. 32.🧩 Nisha bought 2 balls for ₹20 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹10 (c) ₹15 (d) not enough info
33. 33.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) 4 (c) not enough info (d) 8
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
35. 35.🧩 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
36. 36.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
37. 37.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
38. 38.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
39. 39.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
40. 40.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 49 (b) 14 (c) 56 (d) not enough info

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