Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 9 · 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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
7. 7.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
8. 8.🧩 A box has 5 rows of apples, with 7 in each row. How many apples are in the box? (a) 12 (b) 42 (c) not enough info (d) 35
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
10. 10.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
11. 11.🧩 Nisha bought 5 kites for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹250 (b) not enough info (c) ₹50 (d) ₹55
12. 12.🧩 Diya is 8 years old. Ananya is older than Diya. How old is Ananya? (a) not enough info (b) 13 (c) 9 (d) 10
13. 13.🧩 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
14. 14.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
16. 16.🥭 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, it is certain (c) no mango is sweet (d) yes, mangoes match
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
19. 19.🧩 Meera bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹90 (c) ₹20 (d) ₹15
20. 20.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 72 (b) 81 (c) not enough info (d) 17
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.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
24. 24.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Saanvi bought 2 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹50 (c) not enough info (d) ₹90
27. 27.🧩 Diya is 9 years old. Nisha is 6 years older than Diya. How old is Nisha? (a) 6 (b) 16 (c) 15 (d) not enough info
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
29. 29.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
30. 30.🧩 Kabir bought 2 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹60 (c) ₹120 (d) not enough info
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
32. 32.🧩 Kabir bought 6 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹40 (c) not enough info (d) ₹240
33. 33.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
34. 34.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Ananya bought 6 mangoes and a lunch box for ₹290 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) ₹284 (c) ₹290 (d) not enough info
36. 36.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
37. 37.🧩 Saanvi bought 3 balls and a bag for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹70 (b) ₹210 (c) not enough info (d) ₹207
38. 38.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 7 PM
39. 39.🧩 A box has 7 rows of apples, with 5 in each row. How many apples are in the box? (a) 40 (b) 12 (c) not enough info (d) 35
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True

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