Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 809 · 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.🧩 Arjun is 10 years old. Nisha is older than Arjun. How old is Nisha? (a) 11 (b) 15 (c) 12 (d) not enough info
2. 2.🧩 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
3. 3.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
4. 4.🧩 Nisha is 12 years old. Meera is 5 years older than Nisha. How old is Meera? (a) 18 (b) 17 (c) 5 (d) not enough info
5. 5.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 8 PM (c) not enough info (d) 9 PM
6. 6.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 11 (b) not enough info (c) 32 (d) 28
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
9. 9.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
10. 10.🧩 A box has 3 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 16 (b) 12 (c) not enough info (d) 7
11. 11.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
12. 12.🧩 Nisha bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹25 (d) ₹20
13. 13.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
14. 14.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
15. 15.🧩 Arjun is 7 years old. Meera is 6 years older than Arjun. How old is Meera? (a) 14 (b) not enough info (c) 13 (d) 6
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
19. 19.🧩 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
20. 20.🧩 Tara is 10 years old. Nisha is 6 years older than Tara. How old is Nisha? (a) 6 (b) 17 (c) not enough info (d) 16
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
22. 22.🧩 Rohan bought 6 notebooks and a lunch box for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) ₹270 (b) not enough info (c) ₹45 (d) ₹264
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
25. 25.🧩 Nisha bought 3 markers for ₹135 in all. Each marker cost the same. What did one marker cost? (a) ₹135 (b) not enough info (c) ₹50 (d) ₹45
26. 26.🥭 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
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
28. 28.🧩 Diya bought 2 pens for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹110 (c) ₹55 (d) not enough info
29. 29.🧩 Nisha is 9 years old. Rohan is older than Nisha. How old is Rohan? (a) not enough info (b) 11 (c) 10 (d) 14
30. 30.🧩 Aarav is 7 years old. Tara is 8 years older than Aarav. How old is Tara? (a) 16 (b) not enough info (c) 15 (d) 8
31. 31.🧩 Saanvi is 6 years old. Meera is older than Saanvi. How old is Meera? (a) not enough info (b) 11 (c) 8 (d) 7
32. 32.🧩 Ishaan is 6 years old. Kabir is older than Ishaan. How old is Kabir? (a) 11 (b) 7 (c) 8 (d) not enough info
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Meera bought 3 markers and a lunch box for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹177 (b) ₹60 (c) not enough info (d) ₹180
35. 35.🧩 Meera is 10 years old. Kabir is 2 years older than Meera. How old is Kabir? (a) not enough info (b) 12 (c) 2 (d) 13
36. 36.🧩 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
37. 37.🧩 Aarav is 10 years old. Ananya is 4 years older than Aarav. How old is Ananya? (a) 4 (b) 15 (c) not enough info (d) 14
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.🧩 Kabir bought 2 balls and a water bottle for ₹110 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹55 (c) ₹108 (d) ₹110
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class

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