Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 597 · 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: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
2. 2.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Tara is 8 years old. Rohan is 2 years older than Tara. How old is Rohan? (a) not enough info (b) 10 (c) 2 (d) 11
5. 5.🧩 Ananya bought 2 kites for ₹40 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹40
6. 6.🧩 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
7. 7.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
8. 8.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
9. 9.🧩 Nisha is 10 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 15 (b) 12 (c) not enough info (d) 11
10. 10.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
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.🧩 Kabir bought 2 kites and a lunch box for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹138 (b) ₹140 (c) not enough info (d) ₹70
13. 13.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
14. 14.🧩 Arjun bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹300 (d) ₹65
15. 15.🧩 A box has 4 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 36 (c) 13 (d) 45
16. 16.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 80 (b) 16 (c) not enough info (d) 8
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 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 4 PM
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
20. 20.🧩 Tara bought 6 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹180
21. 21.🧩 Meera is 8 years old. Ishaan is older than Meera. How old is Ishaan? (a) not enough info (b) 9 (c) 13 (d) 10
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
23. 23.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
24. 24.🧩 Rohan is 7 years old. Saanvi is older than Rohan. How old is Saanvi? (a) not enough info (b) 12 (c) 9 (d) 8
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
26. 26.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
27. 27.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 4 PM
28. 28.🧩 Aarav is 8 years old. Nisha is older than Aarav. How old is Nisha? (a) not enough info (b) 10 (c) 13 (d) 9
29. 29.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) yes, mangoes match (d) no, check more
30. 30.🧩 Tara bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹15 (c) ₹30 (d) not enough info
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
32. 32.🧩 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
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Meera bought 5 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹75 (c) not enough info (d) ₹20
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
37. 37.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 81 (b) 17 (c) not enough info (d) 72
38. 38.🧩 Ishaan is 8 years old. Meera is 4 years older than Ishaan. How old is Meera? (a) 13 (b) not enough info (c) 12 (d) 4
39. 39.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 4 PM
40. 40.🧩 Meera is 12 years old. Arjun is 5 years older than Meera. How old is Arjun? (a) 17 (b) 5 (c) 18 (d) not enough info

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