Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 806 · 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 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 30 (b) 10 (c) 25 (d) not enough info
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
3. 3.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
4. 4.🧩 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
5. 5.🧩 Kabir bought 4 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) not enough info (c) ₹180 (d) ₹50
6. 6.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 64 (b) 16 (c) 72 (d) not enough info
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
10. 10.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
11. 11.🧩 Nisha is 12 years old. Tara is older than Nisha. How old is Tara? (a) 14 (b) not enough info (c) 17 (d) 13
12. 12.🧩 Kabir bought 4 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹35 (c) ₹120 (d) not enough info
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
15. 15.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) 24 (b) not enough info (c) 10 (d) 30
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
17. 17.🧩 Vihaan bought 5 notebooks and a lunch box for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹22 (c) ₹110 (d) ₹105
18. 18.🧩 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
19. 19.🧩 Diya bought 6 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹40 (c) not enough info (d) ₹240
20. 20.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 7 PM
21. 21.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 6 PM
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
24. 24.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) yes, it is certain (d) no mango is sweet
25. 25.🧩 Nisha bought 4 kites and a lunch box for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) not enough info (c) ₹27 (d) ₹106
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
28. 28.🧩 A box has 4 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 10 (b) not enough info (c) 30 (d) 24
29. 29.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
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Rohan bought 4 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹180 (b) ₹45 (c) not enough info (d) ₹50
32. 32.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 14 (b) 56 (c) not enough info (d) 49
33. 33.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
34. 34.🧩 Aarav is 8 years old. Diya is 8 years older than Aarav. How old is Diya? (a) 16 (b) 17 (c) 8 (d) not enough info
35. 35.🧩 Rohan bought 2 balls for ₹20 in all. Each ball cost the same. What did one ball cost? (a) ₹10 (b) ₹15 (c) not enough info (d) ₹20
36. 36.🧩 Ananya bought 2 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹120 (c) ₹65 (d) not enough info
37. 37.🧩 Kabir is 6 years old. Aarav is 4 years older than Kabir. How old is Aarav? (a) 11 (b) not enough info (c) 10 (d) 4
38. 38.🧩 Arjun bought 3 markers for ₹105 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹105 (c) not enough info (d) ₹35
39. 39.🧩 Kabir is 12 years old. Ishaan is 5 years older than Kabir. How old is Ishaan? (a) not enough info (b) 18 (c) 17 (d) 5
40. 40.🧩 Rohan bought 4 balls and a cap for ₹70 in all. Each ball cost the same. What did one ball cost? (a) ₹17 (b) ₹66 (c) ₹70 (d) not enough info

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