Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 125 · 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.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
2. 2.🧩 Tara bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹50 (c) not enough info (d) ₹270
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Vihaan bought 3 markers and a bag for ₹65 in all. Each marker cost the same. What did one marker cost? (a) ₹21 (b) not enough info (c) ₹62 (d) ₹65
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
6. 6.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
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.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
9. 9.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
10. 10.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
11. 11.🧩 A box has 4 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 45 (b) 13 (c) not enough info (d) 36
12. 12.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
13. 13.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Vihaan bought 2 markers for ₹110 in all. Each marker cost the same. What did one marker cost? (a) ₹110 (b) not enough info (c) ₹55 (d) ₹60
16. 16.🧩 Vihaan is 12 years old. Aarav is 4 years older than Vihaan. How old is Aarav? (a) 4 (b) 17 (c) not enough info (d) 16
17. 17.🧩 Nisha is 9 years old. Aarav is 9 years older than Nisha. How old is Aarav? (a) not enough info (b) 9 (c) 19 (d) 18
18. 18.🧩 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
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
20. 20.🧩 Aarav bought 3 balls and a lunch box for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹165 (b) ₹55 (c) not enough info (d) ₹162
21. 21.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 48 (b) not enough info (c) 40 (d) 13
22. 22.🧩 Kabir is 9 years old. Nisha is older than Kabir. How old is Nisha? (a) 10 (b) 11 (c) 14 (d) not enough info
23. 23.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
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
26. 26.🧩 Vihaan is 6 years old. Nisha is 4 years older than Vihaan. How old is Nisha? (a) 11 (b) 10 (c) not enough info (d) 4
27. 27.🧩 Rohan is 12 years old. Aarav is 5 years older than Rohan. How old is Aarav? (a) 18 (b) not enough info (c) 5 (d) 17
28. 28.🧩 Diya is 6 years old. Rohan is 8 years older than Diya. How old is Rohan? (a) 8 (b) not enough info (c) 15 (d) 14
29. 29.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Ananya is 9 years old. Aarav is 9 years older than Ananya. How old is Aarav? (a) 19 (b) 18 (c) not enough info (d) 9
32. 32.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Diya is 7 years old. Aarav is 6 years older than Diya. How old is Aarav? (a) 13 (b) 14 (c) 6 (d) not enough info
34. 34.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 9 PM
35. 35.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
36. 36.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Arjun bought 3 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) ₹65 (c) ₹60 (d) not enough info
38. 38.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 5 PM
39. 39.🧩 Aarav is 12 years old. Vihaan is older than Aarav. How old is Vihaan? (a) 14 (b) 13 (c) 17 (d) not enough info
40. 40.🧩 Arjun bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹20 (c) ₹15 (d) ₹30

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