Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 609 · 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 asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
2. 2.🥭 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) no, check more (c) yes, mangoes match (d) yes, it is certain
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
5. 5.🧩 A box has 5 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 9 (c) 24 (d) 20
6. 6.🧩 A box has 6 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 14 (b) not enough info (c) 48 (d) 56
7. 7.🧩 Meera is 10 years old. Vihaan is 2 years older than Meera. How old is Vihaan? (a) 2 (b) not enough info (c) 13 (d) 12
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
9. 9.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
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
13. 13.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
14. 14.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
15. 15.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
16. 16.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Rohan is 7 years old. Meera is 3 years older than Rohan. How old is Meera? (a) 10 (b) not enough info (c) 3 (d) 11
19. 19.🧩 A box has 7 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 15 (c) 56 (d) 64
20. 20.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 5 PM (c) 7 PM (d) not enough info
21. 21.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
22. 22.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 3 PM
23. 23.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
25. 25.🧩 Arjun bought 6 kites and a cap for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹74 (c) not enough info (d) ₹13
26. 26.🧩 Aarav is 12 years old. Meera is 5 years older than Aarav. How old is Meera? (a) not enough info (b) 17 (c) 18 (d) 5
27. 27.🧩 Arjun bought 6 balls and a cap for ₹150 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹144 (c) ₹25 (d) ₹150
28. 28.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) not enough info (b) 50 (c) 10 (d) 5
29. 29.🧩 Diya bought 2 notebooks and a water bottle for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹90 (d) ₹88
30. 30.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
32. 32.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
33. 33.🧩 Rohan is 11 years old. Saanvi is 3 years older than Rohan. How old is Saanvi? (a) 15 (b) 3 (c) 14 (d) not enough info
34. 34.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
35. 35.🧩 Diya is 8 years old. Arjun is 7 years older than Diya. How old is Arjun? (a) 7 (b) not enough info (c) 15 (d) 16
36. 36.🧩 Saanvi bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹15 (c) ₹20 (d) not enough info
37. 37.🧩 Diya is 12 years old. Ananya is 5 years older than Diya. How old is Ananya? (a) not enough info (b) 5 (c) 17 (d) 18
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
39. 39.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) 5 PM (d) not enough info
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence

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