Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 363 · 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.🧩 Ananya bought 2 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹15 (c) ₹20 (d) ₹30
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
3. 3.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
4. 4.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 32 (c) 11 (d) 28
5. 5.🧩 Ananya is 7 years old. Saanvi is 9 years older than Ananya. How old is Saanvi? (a) 16 (b) not enough info (c) 9 (d) 17
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
7. 7.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
8. 8.🧩 Meera bought 3 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹35 (c) ₹90 (d) not enough info
9. 9.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) not enough info (c) 16 (d) 8
10. 10.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
11. 11.🧩 Meera is 8 years old. Diya is 4 years older than Meera. How old is Diya? (a) 13 (b) not enough info (c) 12 (d) 4
12. 12.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 4 PM
13. 13.🧩 Arjun bought 5 mangoes and a cap for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹115 (b) ₹120 (c) ₹24 (d) not enough info
14. 14.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
15. 15.🧩 Aarav bought 5 notebooks and a cap for ₹255 in all. Each notebook cost the same. What did one notebook cost? (a) ₹250 (b) ₹255 (c) ₹51 (d) not enough info
16. 16.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
17. 17.🧩 Arjun bought 2 kites and a lunch box for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹85 (b) ₹168 (c) ₹170 (d) not enough info
18. 18.🧩 Tara is 11 years old. Rohan is 5 years older than Tara. How old is Rohan? (a) 17 (b) 16 (c) 5 (d) not enough info
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
21. 21.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
22. 22.🧩 Saanvi is 9 years old. Kabir is older than Saanvi. How old is Kabir? (a) 14 (b) not enough info (c) 10 (d) 11
23. 23.🧩 A box has 5 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 42 (b) not enough info (c) 12 (d) 35
24. 24.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 5 PM
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
26. 26.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
27. 27.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 9 (c) not enough info (d) 18
28. 28.🥭 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 mango is sweet (c) yes, it is certain (d) no, check more
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
30. 30.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 40 (b) not enough info (c) 13 (d) 45
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
32. 32.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) not enough info (c) 5 PM (d) 6 PM
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Saanvi bought 4 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) not enough info (c) ₹80 (d) ₹25
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
38. 38.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) 12 (c) 6 (d) not enough info
39. 39.🧩 A box has 4 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 8 (c) 20 (d) 16
40. 40.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

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