Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 724 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
2. 2.🧩 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
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
4. 4.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
5. 5.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
6. 6.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
7. 7.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
8. 8.🥭 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) no, check more (c) yes, it is certain (d) yes, mangoes match
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
10. 10.🧩 Arjun is 6 years old. Rohan is older than Arjun. How old is Rohan? (a) 7 (b) not enough info (c) 11 (d) 8
11. 11.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Aarav is 10 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 11 (b) 12 (c) not enough info (d) 15
13. 13.🧩 A box has 6 rows of apples, with 9 in each row. How many apples are in the box? (a) 54 (b) 63 (c) 15 (d) not enough info
14. 14.🧩 Meera is 11 years old. Aarav is older than Meera. How old is Aarav? (a) 16 (b) 13 (c) not enough info (d) 12
15. 15.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
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
17. 17.🧩 Ishaan is 7 years old. Meera is 6 years older than Ishaan. How old is Meera? (a) not enough info (b) 13 (c) 14 (d) 6
18. 18.🧩 Vihaan bought 4 notebooks and a bag for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹236 (b) not enough info (c) ₹60 (d) ₹240
19. 19.🧩 Meera bought 3 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹60
20. 20.🧩 Meera is 6 years old. Aarav is 9 years older than Meera. How old is Aarav? (a) 16 (b) 9 (c) 15 (d) not enough info
21. 21.🧩 Saanvi is 8 years old. Aarav is older than Saanvi. How old is Aarav? (a) not enough info (b) 9 (c) 13 (d) 10
22. 22.🧩 Saanvi is 11 years old. Tara is older than Saanvi. How old is Tara? (a) 12 (b) 16 (c) not enough info (d) 13
23. 23.🧩 Saanvi is 9 years old. Meera is 6 years older than Saanvi. How old is Meera? (a) not enough info (b) 16 (c) 6 (d) 15
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
25. 25.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
26. 26.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Rohan bought 2 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹30 (c) ₹25 (d) not enough info
29. 29.🧩 Meera bought 2 balls for ₹20 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹15 (c) ₹10 (d) not enough info
30. 30.🧩 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
31. 31.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
32. 32.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 14 (b) not enough info (c) 56 (d) 48
33. 33.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 6 PM
34. 34.🧩 Nisha is 9 years old. Ananya is older than Nisha. How old is Ananya? (a) 11 (b) 10 (c) 14 (d) not enough info
35. 35.🧩 Rohan bought 6 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹120 (b) not enough info (c) ₹25 (d) ₹20
36. 36.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) 6 PM (d) not enough info
37. 37.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
38. 38.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 9 PM (d) 8 PM
39. 39.🧩 Rohan bought 5 markers and a lunch box for ₹135 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹130 (c) ₹135 (d) ₹27
40. 40.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour

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