Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 260 · 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? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
2. 2.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) no, check more (d) yes, it is certain
4. 4.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Tara bought 6 notebooks and a cap for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹114 (b) ₹120 (c) not enough info (d) ₹20
6. 6.🧩 Ananya bought 5 pens and a cap for ₹315 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹315 (c) ₹310 (d) ₹63
7. 7.🧩 A box has 5 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 45 (c) 54 (d) 14
8. 8.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
10. 10.🧩 A box has 3 rows of eggs, with 7 in each row. How many eggs are in the box? (a) not enough info (b) 10 (c) 21 (d) 28
11. 11.🧩 Nisha bought 3 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹60 (d) ₹20
12. 12.🧩 Saanvi bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹35 (c) not enough info (d) ₹30
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
14. 14.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
15. 15.🧩 Diya is 11 years old. Arjun is 6 years older than Diya. How old is Arjun? (a) 17 (b) 6 (c) not enough info (d) 18
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
17. 17.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 40 (c) not enough info (d) 4
18. 18.🧩 Diya is 6 years old. Meera is older than Diya. How old is Meera? (a) 8 (b) not enough info (c) 11 (d) 7
19. 19.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
20. 20.🧩 Arjun bought 3 balls and a water bottle for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹177 (c) ₹60 (d) ₹180
21. 21.🧩 Diya bought 6 balls and a water bottle for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹18 (b) ₹104 (c) not enough info (d) ₹110
22. 22.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Saanvi is 12 years old. Arjun is 6 years older than Saanvi. How old is Arjun? (a) 18 (b) not enough info (c) 6 (d) 19
25. 25.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
26. 26.🧩 A box has 4 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 28 (b) not enough info (c) 11 (d) 35
27. 27.🧩 A box has 6 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 28 (b) 10 (c) 24 (d) not enough info
28. 28.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) not enough info (d) 7 PM
29. 29.🧩 Nisha is 12 years old. Meera is 5 years older than Nisha. How old is Meera? (a) 18 (b) 17 (c) not enough info (d) 5
30. 30.🧩 Kabir bought 3 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹90 (c) not enough info (d) ₹35
31. 31.🧩 Kabir bought 4 mangoes and a cap for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) ₹116 (c) ₹30 (d) not enough info
32. 32.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 6 (d) 60
33. 33.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
34. 34.🧩 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
35. 35.🧩 Tara bought 3 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) not enough info (c) ₹10 (d) ₹30
36. 36.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
37. 37.🧩 Vihaan bought 4 balls and a bag for ₹120 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹120 (c) ₹30 (d) ₹116
38. 38.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
40. 40.🧩 Ananya bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) not enough info (c) ₹45 (d) ₹50

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