Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 128 · 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 measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
4. 4.🧩 Vihaan bought 6 markers and a water bottle for ₹320 in all. Each marker cost the same. What did one marker cost? (a) ₹314 (b) ₹53 (c) ₹320 (d) not enough info
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
6. 6.🧩 A box has 7 rows of oranges, with 7 in each row. How many oranges are in the box? (a) not enough info (b) 49 (c) 56 (d) 14
7. 7.🧩 Tara bought 4 balls and a cap for ₹100 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹100 (c) ₹96 (d) ₹25
8. 8.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
9. 9.🧩 Rohan is 11 years old. Ishaan is 2 years older than Rohan. How old is Ishaan? (a) not enough info (b) 2 (c) 14 (d) 13
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
11. 11.🧩 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
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” does not give 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) your handwriting (d) what facts are given
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
16. 16.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
18. 18.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
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) yes, mangoes match (c) no mango is sweet (d) no, check more
20. 20.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
21. 21.🧩 Ananya bought 4 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) not enough info (c) ₹120 (d) ₹30
22. 22.🧩 Nisha bought 3 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) not enough info (c) ₹30 (d) ₹10
23. 23.🧩 A box has 7 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 64 (c) 15 (d) 56
24. 24.🧩 Meera bought 3 markers and a cap for ₹145 in all. Each marker cost the same. What did one marker cost? (a) ₹145 (b) ₹142 (c) ₹48 (d) not enough info
25. 25.🧩 Arjun is 11 years old. Rohan is older than Arjun. How old is Rohan? (a) 12 (b) not enough info (c) 13 (d) 16
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
27. 27.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
28. 28.🧩 A box has 7 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 48 (b) not enough info (c) 13 (d) 42
29. 29.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
30. 30.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) 9 (c) 20 (d) not enough info
31. 31.🧩 A box has 3 rows of oranges, with 6 in each row. How many oranges are in the box? (a) not enough info (b) 18 (c) 24 (d) 9
32. 32.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) not enough info (d) 9 PM
33. 33.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
34. 34.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 7 PM
35. 35.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 5 PM
36. 36.🧩 Aarav bought 3 notebooks and a cap for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹160 (b) not enough info (c) ₹53 (d) ₹157
37. 37.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 16 (b) 80 (c) 8 (d) not enough info
38. 38.🧩 Nisha is 9 years old. Ananya is 9 years older than Nisha. How old is Ananya? (a) 19 (b) 9 (c) 18 (d) not enough info
39. 39.🧩 Saanvi bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹225 (c) ₹45 (d) ₹50
40. 40.🧩 A box has 7 rows of apples, with 6 in each row. How many apples are in the box? (a) 13 (b) not enough info (c) 42 (d) 48

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