Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 380 · 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.🧩 Kabir bought 5 kites and a bag for ₹105 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹105 (c) ₹21 (d) not enough info
2. 2.🧩 Ishaan bought 5 kites and a cap for ₹360 in all. Each kite cost the same. What did one kite cost? (a) ₹355 (b) not enough info (c) ₹360 (d) ₹72
3. 3.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
4. 4.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 4 PM
5. 5.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
6. 6.🧩 Rohan bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹30 (c) ₹125 (d) not enough info
7. 7.🧩 Nisha bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹60
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Vihaan bought 4 kites and a bag for ₹280 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) ₹276 (c) ₹280 (d) not enough info
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
13. 13.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
14. 14.🧩 Vihaan bought 4 pens and a lunch box for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹37 (b) ₹146 (c) not enough info (d) ₹150
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
18. 18.🧩 Meera bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹180 (c) ₹35 (d) ₹30
19. 19.🧩 Kabir bought 6 notebooks and a bag for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹204 (b) not enough info (c) ₹35 (d) ₹210
20. 20.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
21. 21.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 40 (c) 12 (d) 32
22. 22.🧩 Diya bought 5 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹150 (c) ₹35 (d) ₹30
23. 23.🧩 Nisha is 9 years old. Meera is older than Nisha. How old is Meera? (a) not enough info (b) 14 (c) 10 (d) 11
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
27. 27.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
28. 28.🧩 Rohan bought 4 kites and a water bottle for ₹170 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹166 (c) ₹42 (d) ₹170
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
30. 30.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Nisha is 7 years old. Ananya is older than Nisha. How old is Ananya? (a) 8 (b) 9 (c) not enough info (d) 12
33. 33.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 9 PM (d) 8 PM
34. 34.🧩 Saanvi bought 4 markers and a water bottle for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹200 (b) ₹50 (c) ₹196 (d) not enough info
35. 35.🧩 Saanvi is 10 years old. Kabir is older than Saanvi. How old is Kabir? (a) 15 (b) 12 (c) not enough info (d) 11
36. 36.🧩 Ishaan bought 3 notebooks for ₹45 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹45
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
39. 39.🧩 Ishaan bought 3 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹75
40. 40.🥭 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) no mango is sweet (d) yes, it is certain

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