Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 213 · 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.🧩 Meera bought 2 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹80 (c) ₹45 (d) not enough info
2. 2.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
3. 3.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 8 PM (c) 6 PM (d) not enough info
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
7. 7.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
9. 9.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) not enough info (c) 5 (d) 10
10. 10.🧩 Ishaan bought 3 notebooks and a cap for ₹195 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹195 (c) ₹65 (d) ₹192
11. 11.🧩 Ananya bought 6 mangoes and a water bottle for ₹360 in all. Each mango cost the same. What did one mango cost? (a) ₹360 (b) ₹354 (c) ₹60 (d) not enough info
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
14. 14.🧩 Kabir is 11 years old. Aarav is older than Kabir. How old is Aarav? (a) not enough info (b) 16 (c) 13 (d) 12
15. 15.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
17. 17.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
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.🧩 Diya bought 3 pens for ₹105 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹35 (c) ₹105 (d) not enough info
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Diya bought 5 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹10 (c) ₹15 (d) not enough info
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
24. 24.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
25. 25.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
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.🧩 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
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
32. 32.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 9 PM
33. 33.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
35. 35.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
36. 36.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) 11 (b) 36 (c) not enough info (d) 30
37. 37.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 45 (b) not enough info (c) 13 (d) 40
38. 38.🧩 Ananya bought 5 markers and a bag for ₹205 in all. Each marker cost the same. What did one marker cost? (a) ₹205 (b) ₹41 (c) ₹200 (d) not enough info
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True

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