Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 451 · 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.🧩 Ishaan is 8 years old. Nisha is 5 years older than Ishaan. How old is Nisha? (a) 14 (b) 13 (c) not enough info (d) 5
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
3. 3.🧩 Aarav bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) ₹15 (c) ₹10 (d) not enough info
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
6. 6.🧩 Tara is 9 years old. Aarav is 2 years older than Tara. How old is Aarav? (a) 11 (b) 2 (c) not enough info (d) 12
7. 7.🧩 A box has 5 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 11 (b) 30 (c) 36 (d) not enough info
8. 8.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
9. 9.🧩 Kabir is 9 years old. Arjun is 6 years older than Kabir. How old is Arjun? (a) 16 (b) 6 (c) not enough info (d) 15
10. 10.🧩 Saanvi bought 4 mangoes and a cap for ₹190 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹190 (c) ₹186 (d) ₹47
11. 11.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 27 (c) 36 (d) 12
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
14. 14.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Meera is 12 years old. Tara is 8 years older than Meera. How old is Tara? (a) 20 (b) not enough info (c) 21 (d) 8
16. 16.🧩 Nisha bought 5 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹25 (c) ₹100 (d) not enough info
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.🥭 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) no, check more (c) no mango is sweet (d) yes, it is certain
22. 22.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
23. 23.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
24. 24.🧩 Aarav is 8 years old. Kabir is older than Aarav. How old is Kabir? (a) 10 (b) not enough info (c) 13 (d) 9
25. 25.🧩 Vihaan bought 6 pens for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹210 (c) ₹35 (d) not enough info
26. 26.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 48 (b) 54 (c) not enough info (d) 14
27. 27.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Rohan bought 3 markers and a water bottle for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹73 (b) not enough info (c) ₹220 (d) ₹217
29. 29.🧩 Ananya bought 2 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹20 (c) not enough info (d) ₹15
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
31. 31.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
32. 32.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
33. 33.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
34. 34.🧩 A box has 3 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 32 (c) 24 (d) 11
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
36. 36.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM
37. 37.🧩 Kabir bought 3 balls and a bag for ₹85 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹85 (c) ₹28 (d) ₹82
38. 38.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 12 (b) 36 (c) not enough info (d) 42
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
40. 40.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info

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