Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 281 · 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.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 70 (c) not enough info (d) 14
2. 2.🧩 Ananya is 6 years old. Arjun is 9 years older than Ananya. How old is Arjun? (a) 9 (b) 15 (c) not enough info (d) 16
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
4. 4.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
6. 6.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 4 PM
7. 7.🧩 Rohan bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) not enough info (c) ₹50 (d) ₹55
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) not enough info (d) 9 PM
10. 10.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 30 (b) 24 (c) not enough info (d) 10
11. 11.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Vihaan bought 4 markers for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹240 (b) ₹65 (c) not enough info (d) ₹60
13. 13.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
14. 14.🧩 Arjun bought 2 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹50 (c) ₹25 (d) not enough info
15. 15.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
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 7 PM (c) 8 PM (d) not enough info
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
18. 18.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 3 PM
19. 19.🧩 Rohan is 7 years old. Kabir is 7 years older than Rohan. How old is Kabir? (a) not enough info (b) 14 (c) 15 (d) 7
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
21. 21.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) for fun only (d) to waste time
22. 22.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) 8 PM (d) not enough info
23. 23.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
25. 25.🧩 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
26. 26.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
27. 27.📊 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
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
30. 30.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 70 (d) 7
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Ananya bought 6 pens and a bag for ₹320 in all. Each pen cost the same. What did one pen cost? (a) ₹320 (b) ₹53 (c) not enough info (d) ₹314
33. 33.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
34. 34.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Saanvi bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) ₹50 (c) not enough info (d) ₹90
36. 36.🧩 Tara bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹35 (c) not enough info (d) ₹30
37. 37.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
38. 38.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
40. 40.🧩 Ananya is 8 years old. Kabir is older than Ananya. How old is Kabir? (a) not enough info (b) 9 (c) 10 (d) 13

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