Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 276 · 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: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
2. 2.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
3. 3.🧩 Saanvi is 10 years old. Nisha is older than Saanvi. How old is Nisha? (a) 12 (b) 11 (c) not enough info (d) 15
4. 4.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 4 PM
5. 5.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
6. 6.🧩 Tara bought 3 notebooks and a lunch box for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹217 (b) ₹220 (c) not enough info (d) ₹73
7. 7.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
10. 10.🧩 Meera is 9 years old. Kabir is 5 years older than Meera. How old is Kabir? (a) 15 (b) not enough info (c) 5 (d) 14
11. 11.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Saanvi is 7 years old. Nisha is 6 years older than Saanvi. How old is Nisha? (a) 6 (b) 13 (c) 14 (d) not enough info
13. 13.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
18. 18.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
19. 19.🥭 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, check more (c) no mango is sweet (d) yes, mangoes match
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
21. 21.🧩 Ananya bought 5 balls and a bag for ₹220 in all. Each ball cost the same. What did one ball cost? (a) ₹215 (b) not enough info (c) ₹220 (d) ₹44
22. 22.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 4 (d) 8
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Arjun is 6 years old. Ishaan is older than Arjun. How old is Ishaan? (a) 8 (b) 7 (c) not enough info (d) 11
25. 25.🧩 Kabir bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) not enough info (c) ₹60 (d) ₹220
26. 26.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
28. 28.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 2 PM
29. 29.🧩 Arjun is 8 years old. Meera is 2 years older than Arjun. How old is Meera? (a) 11 (b) not enough info (c) 10 (d) 2
30. 30.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
31. 31.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
33. 33.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
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
35. 35.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
36. 36.🧩 Diya bought 6 pens and a water bottle for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹164 (b) not enough info (c) ₹170 (d) ₹28
37. 37.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Vihaan bought 2 pens for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹60 (c) ₹110 (d) not enough info
39. 39.🧩 Saanvi bought 6 kites and a lunch box for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹300 (b) ₹50 (c) ₹294 (d) not enough info
40. 40.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info

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