Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 746 · 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.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
3. 3.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
4. 4.🥭 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
5. 5.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 25 (b) not enough info (c) 30 (d) 10
6. 6.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
7. 7.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 63 (b) not enough info (c) 16 (d) 72
8. 8.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
10. 10.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
11. 11.🧩 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
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Rohan is 10 years old. Ananya is 3 years older than Rohan. How old is Ananya? (a) 13 (b) 14 (c) 3 (d) not enough info
14. 14.🧩 Diya is 7 years old. Vihaan is 7 years older than Diya. How old is Vihaan? (a) 15 (b) not enough info (c) 7 (d) 14
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
16. 16.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) 60 (c) 12 (d) not enough info
17. 17.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 5 PM (c) not enough info (d) 8 PM
18. 18.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
19. 19.🧩 Aarav bought 2 markers and a water bottle for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) ₹178 (c) not enough info (d) ₹90
20. 20.🧩 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
21. 21.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
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
23. 23.🧩 Diya bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹20 (c) ₹15 (d) ₹45
24. 24.🧩 Arjun bought 5 balls and a cap for ₹305 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹300 (c) ₹305 (d) ₹61
25. 25.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
26. 26.🧩 Saanvi bought 2 notebooks and a water bottle for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹98 (c) ₹50 (d) not enough info
27. 27.🧩 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
28. 28.🧩 Rohan is 12 years old. Diya is older than Rohan. How old is Diya? (a) 17 (b) 14 (c) 13 (d) not enough info
29. 29.🧩 Meera bought 3 mangoes for ₹165 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹165 (c) not enough info (d) ₹55
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
31. 31.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
32. 32.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 3 PM
33. 33.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
34. 34.🧩 Rohan bought 2 balls and a water bottle for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹20 (c) not enough info (d) ₹38
35. 35.🧩 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
36. 36.🧩 Saanvi is 6 years old. Aarav is 3 years older than Saanvi. How old is Aarav? (a) 3 (b) 10 (c) not enough info (d) 9
37. 37.🧩 Ishaan bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹20 (d) ₹15
38. 38.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
40. 40.🧩 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

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