Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 271 · 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.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
2. 2.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 10 PM (c) not enough info (d) 9 PM
3. 3.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 6 PM
4. 4.🧩 Rohan bought 4 markers and a water bottle for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹170 (b) ₹166 (c) not enough info (d) ₹42
5. 5.🧩 Aarav bought 3 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) ₹35 (c) ₹30 (d) not enough info
6. 6.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 3 PM
7. 7.🧩 Kabir is 11 years old. Aarav is 9 years older than Kabir. How old is Aarav? (a) 9 (b) not enough info (c) 20 (d) 21
8. 8.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Meera bought 2 kites and a lunch box for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹50 (c) ₹98 (d) not enough info
10. 10.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
11. 11.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 16 (b) not enough info (c) 8 (d) 80
12. 12.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
13. 13.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 18 (d) 90
14. 14.🧩 Arjun is 7 years old. Rohan is 4 years older than Arjun. How old is Rohan? (a) 12 (b) not enough info (c) 4 (d) 11
15. 15.🧩 Ishaan bought 6 mangoes for ₹360 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹360 (c) ₹65 (d) ₹60
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
17. 17.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Aarav bought 3 balls and a bag for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹165 (b) ₹162 (c) not enough info (d) ₹55
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
24. 24.🧩 Tara is 8 years old. Ishaan is older than Tara. How old is Ishaan? (a) 10 (b) 13 (c) 9 (d) not enough info
25. 25.🧩 Ishaan is 7 years old. Vihaan is 2 years older than Ishaan. How old is Vihaan? (a) 9 (b) 10 (c) 2 (d) not enough info
26. 26.🧩 Ananya bought 4 pens and a lunch box for ₹220 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) not enough info (c) ₹216 (d) ₹220
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
29. 29.🧩 Aarav bought 5 balls for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹250 (b) ₹50 (c) not enough info (d) ₹55
30. 30.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
31. 31.🧩 Saanvi bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹120 (c) ₹65 (d) ₹60
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
33. 33.🧩 Meera is 10 years old. Rohan is 5 years older than Meera. How old is Rohan? (a) 5 (b) not enough info (c) 15 (d) 16
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
35. 35.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 15 (d) 20
36. 36.🧩 Diya bought 4 kites and a lunch box for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹180 (c) not enough info (d) ₹176
37. 37.🧩 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
38. 38.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
39. 39.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 3 PM
40. 40.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM

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