Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 808 · 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.🧩 Saanvi is 12 years old. Rohan is older than Saanvi. How old is Rohan? (a) not enough info (b) 17 (c) 13 (d) 14
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) no, check more (d) yes, mangoes match
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.🧩 Saanvi bought 2 mangoes and a water bottle for ₹160 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹160 (c) ₹158 (d) ₹80
5. 5.🧩 Aarav is 7 years old. Kabir is older than Aarav. How old is Kabir? (a) 8 (b) 9 (c) not enough info (d) 12
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
7. 7.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
8. 8.🧩 Rohan is 12 years old. Diya is 7 years older than Rohan. How old is Diya? (a) 7 (b) not enough info (c) 19 (d) 20
9. 9.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
10. 10.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 7 PM
11. 11.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 10 (b) 28 (c) not enough info (d) 21
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 3 PM (c) 4 PM (d) not enough info
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
15. 15.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
16. 16.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
19. 19.🧩 Tara bought 3 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹45 (c) not enough info (d) ₹40
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
21. 21.🧩 Saanvi is 11 years old. Meera is older than Saanvi. How old is Meera? (a) not enough info (b) 12 (c) 16 (d) 13
22. 22.🧩 Tara bought 6 pens and a lunch box for ₹270 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹270 (d) ₹264
23. 23.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 4 PM (c) 7 PM (d) not enough info
24. 24.🧩 Meera bought 5 balls and a lunch box for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹80 (b) ₹75 (c) not enough info (d) ₹16
25. 25.🧩 Ishaan is 12 years old. Kabir is 3 years older than Ishaan. How old is Kabir? (a) not enough info (b) 16 (c) 3 (d) 15
26. 26.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
27. 27.🧩 Meera bought 6 markers and a lunch box for ₹240 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹240 (c) ₹40 (d) ₹234
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
29. 29.🧩 Nisha is 10 years old. Tara is 4 years older than Nisha. How old is Tara? (a) 14 (b) 4 (c) 15 (d) not enough info
30. 30.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 6 PM
31. 31.🧩 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
32. 32.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
33. 33.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
34. 34.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
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Rohan bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹90
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Aarav bought 2 markers and a bag for ₹130 in all. Each marker cost the same. What did one marker cost? (a) ₹128 (b) ₹130 (c) ₹65 (d) not enough info
39. 39.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
40. 40.🧩 Aarav bought 2 markers and a water bottle for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹160 (b) not enough info (c) ₹158 (d) ₹80

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