Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 823 · 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? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Ananya bought 4 mangoes and a cap for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹116 (c) not enough info (d) ₹120
3. 3.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
8. 8.🧩 A box has 6 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 63 (b) 15 (c) 54 (d) not enough info
9. 9.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
10. 10.🧩 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
11. 11.🧩 Ishaan bought 5 markers and a bag for ₹205 in all. Each marker cost the same. What did one marker cost? (a) ₹41 (b) not enough info (c) ₹200 (d) ₹205
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 7 PM
13. 13.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
15. 15.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
16. 16.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
20. 20.🧩 A box has 6 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 12 (b) 42 (c) not enough info (d) 36
21. 21.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 2 PM
22. 22.🧩 Nisha is 9 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 14 (b) 11 (c) not enough info (d) 10
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Saanvi is 6 years old. Ananya is older than Saanvi. How old is Ananya? (a) 11 (b) 8 (c) 7 (d) not enough info
26. 26.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 40 (d) 35
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (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) not enough info (c) 5 PM (d) 2 PM
29. 29.🧩 A box has 7 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 11 (b) 32 (c) 28 (d) not enough info
30. 30.🧩 Ishaan bought 2 mangoes and a lunch box for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹138 (b) not enough info (c) ₹140 (d) ₹70
31. 31.🧩 Vihaan bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹15 (d) ₹10
32. 32.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
33. 33.🧩 Tara bought 2 pens and a lunch box for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹210 (b) ₹208 (c) not enough info (d) ₹105
34. 34.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
35. 35.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
36. 36.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
37. 37.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 13 (c) 40 (d) 45
39. 39.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
40. 40.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers

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