Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 102 · 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? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Aarav bought 2 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹65 (c) ₹60 (d) not enough info
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
4. 4.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM
5. 5.🧩 Meera is 11 years old. Saanvi is 7 years older than Meera. How old is Saanvi? (a) 7 (b) 19 (c) 18 (d) not enough info
6. 6.🧩 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
7. 7.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
8. 8.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
11. 11.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) 3 PM (d) not enough info
12. 12.🧩 Saanvi bought 2 pens and a lunch box for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹78 (c) ₹80 (d) not enough info
13. 13.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
14. 14.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 8 PM (c) 5 PM (d) not enough info
15. 15.🧩 Vihaan is 11 years old. Ananya is 8 years older than Vihaan. How old is Ananya? (a) not enough info (b) 19 (c) 8 (d) 20
16. 16.🧩 Aarav is 8 years old. Tara is 9 years older than Aarav. How old is Tara? (a) 17 (b) not enough info (c) 9 (d) 18
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) no, check more (c) no mango is sweet (d) yes, it is certain
18. 18.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 11 (b) 30 (c) not enough info (d) 35
19. 19.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
20. 20.📊 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
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Rohan is 8 years old. Kabir is 7 years older than Rohan. How old is Kabir? (a) 16 (b) 15 (c) not enough info (d) 7
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
25. 25.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 24 (c) not enough info (d) 20
26. 26.🧩 Rohan is 10 years old. Saanvi is 2 years older than Rohan. How old is Saanvi? (a) 2 (b) not enough info (c) 13 (d) 12
27. 27.🧩 Aarav is 7 years old. Diya is 6 years older than Aarav. How old is Diya? (a) 13 (b) not enough info (c) 14 (d) 6
28. 28.🧩 Aarav is 11 years old. Saanvi is 9 years older than Aarav. How old is Saanvi? (a) not enough info (b) 9 (c) 20 (d) 21
29. 29.🧩 Arjun bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹55 (c) ₹50 (d) ₹200
30. 30.🧩 Meera bought 3 mangoes and a bag for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹167 (b) ₹56 (c) ₹170 (d) not enough info
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
33. 33.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
34. 34.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
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) 6 PM (d) 5 PM
36. 36.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
37. 37.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
39. 39.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 9 (b) not enough info (c) 18 (d) 90
40. 40.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink

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