Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 42 · 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.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
3. 3.🥭 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, mangoes match (c) yes, it is certain (d) no mango is sweet
4. 4.🧩 Nisha is 10 years old. Ananya is older than Nisha. How old is Ananya? (a) 11 (b) 15 (c) 12 (d) not enough info
5. 5.🧩 Ishaan bought 6 pens and a cap for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹134 (c) ₹23 (d) ₹140
6. 6.🧩 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
7. 7.🧩 Aarav bought 6 markers for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹45 (d) ₹270
8. 8.🧩 A box has 8 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 15 (b) 56 (c) not enough info (d) 63
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
11. 11.🧩 A box has 7 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 56 (c) 64 (d) 15
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
16. 16.🧩 Rohan bought 6 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) not enough info (c) ₹15 (d) ₹20
17. 17.🧩 Meera bought 3 kites for ₹165 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹165 (c) not enough info (d) ₹55
18. 18.🧩 Rohan is 11 years old. Vihaan is 4 years older than Rohan. How old is Vihaan? (a) 15 (b) 4 (c) 16 (d) not enough info
19. 19.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
20. 20.🧩 Aarav bought 5 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) ₹150 (c) ₹30 (d) not enough info
21. 21.🧩 Ananya bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹10 (d) ₹60
22. 22.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
23. 23.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
24. 24.🧩 Ananya bought 5 mangoes and a lunch box for ₹110 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹105 (c) ₹22 (d) ₹110
25. 25.🧩 Aarav is 12 years old. Diya is 9 years older than Aarav. How old is Diya? (a) not enough info (b) 9 (c) 21 (d) 22
26. 26.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
27. 27.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
28. 28.🧩 Vihaan is 8 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) not enough info (b) 13 (c) 10 (d) 9
29. 29.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
31. 31.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
34. 34.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 12 (b) 36 (c) not enough info (d) 27
35. 35.🧩 Tara is 10 years old. Aarav is 6 years older than Tara. How old is Aarav? (a) 6 (b) 16 (c) 17 (d) not enough info
36. 36.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
37. 37.🧩 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
38. 38.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
39. 39.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 6 (b) 60 (c) not enough info (d) 12
40. 40.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info

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