Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 109 · 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 of guavas has 6 in each row. How many guavas are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
2. 2.🧩 A box has 5 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 54 (c) 14 (d) 45
3. 3.🧩 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
4. 4.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) not enough info (c) 14 (d) 70
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
6. 6.🧩 Arjun is 8 years old. Meera is 6 years older than Arjun. How old is Meera? (a) 15 (b) 14 (c) not enough info (d) 6
7. 7.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Tara is 10 years old. Ishaan is older than Tara. How old is Ishaan? (a) 11 (b) not enough info (c) 12 (d) 15
10. 10.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
11. 11.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Rohan is 8 years old. Diya is older than Rohan. How old is Diya? (a) not enough info (b) 9 (c) 10 (d) 13
14. 14.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Ananya bought 6 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹90
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Arjun is 7 years old. Aarav is 3 years older than Arjun. How old is Aarav? (a) 10 (b) 3 (c) not enough info (d) 11
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
20. 20.🧩 Arjun is 7 years old. Ishaan is 7 years older than Arjun. How old is Ishaan? (a) not enough info (b) 7 (c) 15 (d) 14
21. 21.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 48 (b) not enough info (c) 13 (d) 40
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.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 7 PM
24. 24.🧩 Kabir bought 6 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹21 (b) not enough info (c) ₹130 (d) ₹124
25. 25.🧩 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
26. 26.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Meera bought 4 markers and a cap for ₹280 in all. Each marker cost the same. What did one marker cost? (a) ₹276 (b) ₹70 (c) not enough info (d) ₹280
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
29. 29.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Aarav is 7 years old. Diya is 7 years older than Aarav. How old is Diya? (a) 15 (b) 14 (c) 7 (d) not enough info
31. 31.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
32. 32.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Diya bought 4 notebooks and a water bottle for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹110 (b) not enough info (c) ₹106 (d) ₹27
34. 34.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
35. 35.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
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
37. 37.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
38. 38.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
39. 39.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
40. 40.🥭 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, check more (c) no mango is sweet (d) yes, it is certain

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