Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 566 · 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.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 72 (b) not enough info (c) 16 (d) 64
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
3. 3.🧩 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
4. 4.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
6. 6.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
7. 7.🧩 Aarav is 9 years old. Diya is older than Aarav. How old is Diya? (a) 11 (b) not enough info (c) 10 (d) 14
8. 8.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
9. 9.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
10. 10.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
11. 11.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 7 PM (c) 4 PM (d) not enough info
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
15. 15.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
21. 21.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
22. 22.🧩 Nisha bought 4 balls and a water bottle for ₹320 in all. Each ball cost the same. What did one ball cost? (a) ₹316 (b) ₹320 (c) not enough info (d) ₹80
23. 23.🧩 Vihaan bought 5 pens and a water bottle for ₹115 in all. Each pen cost the same. What did one pen cost? (a) ₹23 (b) ₹110 (c) not enough info (d) ₹115
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Aarav bought 4 markers and a cap for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹216 (b) ₹220 (c) not enough info (d) ₹55
26. 26.🧩 Kabir bought 3 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹75 (d) ₹25
27. 27.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
28. 28.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
29. 29.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 11 (b) not enough info (c) 30 (d) 35
30. 30.🧩 Ishaan bought 6 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹40 (c) ₹240 (d) not enough info
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
32. 32.🧩 Kabir is 7 years old. Nisha is 2 years older than Kabir. How old is Nisha? (a) not enough info (b) 9 (c) 2 (d) 10
33. 33.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
34. 34.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
35. 35.🧩 A box has 8 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 56 (c) 63 (d) 15
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
37. 37.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 6 (b) 12 (c) not enough info (d) 60
38. 38.🧩 Rohan is 9 years old. Diya is 5 years older than Rohan. How old is Diya? (a) 5 (b) 15 (c) not enough info (d) 14
39. 39.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False

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