Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 561 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Tara bought 3 notebooks and a water bottle for ₹215 in all. Each notebook cost the same. What did one notebook cost? (a) ₹71 (b) not enough info (c) ₹212 (d) ₹215
4. 4.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 6 PM (d) 9 PM
5. 5.🧩 A box has 5 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 13 (b) 40 (c) not enough info (d) 48
6. 6.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Tara bought 5 notebooks for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹125 (b) ₹30 (c) ₹25 (d) not enough info
9. 9.🧩 Saanvi bought 3 notebooks and a lunch box for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹73 (b) not enough info (c) ₹220 (d) ₹217
10. 10.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) for fun only (d) to be sure of results
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
12. 12.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 54 (b) not enough info (c) 63 (d) 15
13. 13.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
14. 14.🧩 Diya bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹220 (d) ₹55
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
18. 18.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
19. 19.🧩 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
20. 20.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
21. 21.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 7 PM
22. 22.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 54 (b) 14 (c) 48 (d) not enough info
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
25. 25.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
26. 26.📊 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
27. 27.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 5 PM
28. 28.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 6 PM
29. 29.🧩 Saanvi bought 6 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹10 (c) not enough info (d) ₹15
30. 30.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Ishaan is 11 years old. Diya is older than Ishaan. How old is Diya? (a) 12 (b) not enough info (c) 16 (d) 13
32. 32.🧩 Arjun is 9 years old. Ananya is 2 years older than Arjun. How old is Ananya? (a) 2 (b) 12 (c) not enough info (d) 11
33. 33.🧩 A box has 8 rows of apples, with 8 in each row. How many apples are in the box? (a) 64 (b) not enough info (c) 16 (d) 72
34. 34.🧩 Aarav bought 5 balls for ₹225 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹50 (d) ₹225
35. 35.🧩 A box has 7 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 12 (b) 35 (c) 40 (d) not enough info
36. 36.🧩 Meera is 12 years old. Diya is older than Meera. How old is Diya? (a) 17 (b) 13 (c) 14 (d) not enough info
37. 37.🧩 Nisha bought 3 pens and a cap for ₹135 in all. Each pen cost the same. What did one pen cost? (a) ₹135 (b) ₹45 (c) ₹132 (d) not enough info
38. 38.🧩 Aarav bought 5 markers and a water bottle for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹250 (b) ₹50 (c) not enough info (d) ₹245
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Diya bought 2 markers and a water bottle for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) ₹75 (c) not enough info (d) ₹148

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