Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 684 · 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.📊 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
2. 2.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 40 (c) not enough info (d) 4
3. 3.🥭 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) no mango is sweet (c) yes, it is certain (d) no, check more
4. 4.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
5. 5.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Ananya is 6 years old. Aarav is older than Ananya. How old is Aarav? (a) 7 (b) not enough info (c) 8 (d) 11
8. 8.🧩 Diya bought 5 mangoes for ₹275 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) ₹275 (c) not enough info (d) ₹60
9. 9.🧩 Vihaan is 10 years old. Diya is older than Vihaan. How old is Diya? (a) 15 (b) 12 (c) 11 (d) not enough info
10. 10.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Arjun bought 5 notebooks and a bag for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹325 (b) ₹330 (c) not enough info (d) ₹66
12. 12.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
13. 13.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
14. 14.🧩 Arjun bought 4 balls and a water bottle for ₹120 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹120 (c) ₹30 (d) ₹116
15. 15.🧩 Diya is 6 years old. Arjun is 7 years older than Diya. How old is Arjun? (a) 14 (b) 13 (c) 7 (d) not enough info
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
17. 17.🧩 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
18. 18.🧩 Diya bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹225 (c) ₹50 (d) not enough info
19. 19.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
20. 20.🧩 Rohan is 8 years old. Aarav is older than Rohan. How old is Aarav? (a) 10 (b) not enough info (c) 9 (d) 13
21. 21.🧩 A box has 6 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 42 (b) 12 (c) not enough info (d) 36
22. 22.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
23. 23.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 7 PM
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
25. 25.🧩 Arjun bought 3 pens and a cap for ₹250 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹250 (c) ₹83 (d) ₹247
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
27. 27.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 16 (b) 64 (c) not enough info (d) 72
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
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.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
32. 32.🧩 A box has 4 rows of apples, with 7 in each row. How many apples are in the box? (a) 28 (b) not enough info (c) 35 (d) 11
33. 33.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
34. 34.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 8 PM
35. 35.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 48 (b) 13 (c) not enough info (d) 42
36. 36.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 3 PM
37. 37.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
38. 38.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 12 (c) 32 (d) 40
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False

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