Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 515 · 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.🧩 Vihaan is 7 years old. Arjun is 3 years older than Vihaan. How old is Arjun? (a) 3 (b) not enough info (c) 10 (d) 11
2. 2.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
4. 4.🥭 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
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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Nisha is 8 years old. Kabir is older than Nisha. How old is Kabir? (a) 9 (b) 13 (c) 10 (d) not enough info
10. 10.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
11. 11.🧩 Meera is 7 years old. Aarav is 5 years older than Meera. How old is Aarav? (a) not enough info (b) 5 (c) 13 (d) 12
12. 12.🧩 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
13. 13.🧩 Meera bought 2 mangoes and a water bottle for ₹130 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹130 (c) ₹65 (d) ₹128
14. 14.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
17. 17.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 8 PM
18. 18.🧩 Ananya bought 4 markers for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹55 (c) ₹200 (d) not enough info
19. 19.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
20. 20.🧩 Vihaan bought 3 notebooks and a water bottle for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹117 (c) ₹40 (d) not enough info
21. 21.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 5 (c) 50 (d) 10
22. 22.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
23. 23.🧩 Rohan is 9 years old. Kabir is 7 years older than Rohan. How old is Kabir? (a) 16 (b) 7 (c) not enough info (d) 17
24. 24.🧩 Tara is 12 years old. Meera is older than Tara. How old is Meera? (a) 13 (b) 14 (c) 17 (d) not enough info
25. 25.🧩 Saanvi bought 5 markers and a water bottle for ₹345 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹340 (c) ₹69 (d) ₹345
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
28. 28.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 45 (b) not enough info (c) 13 (d) 36
29. 29.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) 6 PM (d) not enough info
30. 30.🧩 Diya bought 2 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹20 (c) ₹30 (d) not enough info
31. 31.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
32. 32.🧩 A box has 6 rows of eggs, with 6 in each row. How many eggs are in the box? (a) not enough info (b) 42 (c) 36 (d) 12
33. 33.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 5 PM
34. 34.🧩 Nisha bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) not enough info (c) ₹65 (d) ₹60
35. 35.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
36. 36.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 3 PM
37. 37.🧩 A box has 8 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 12 (b) not enough info (c) 36 (d) 32
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Ananya is 6 years old. Diya is older than Ananya. How old is Diya? (a) not enough info (b) 8 (c) 7 (d) 11
40. 40.🧩 Ananya bought 6 markers and a lunch box for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹294 (b) not enough info (c) ₹50 (d) ₹300

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