Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 901 · 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.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
2. 2.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 15 (b) not enough info (c) 54 (d) 63
3. 3.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) for fun only (d) to change answers
4. 4.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
6. 6.🧩 Saanvi is 6 years old. Vihaan is 8 years older than Saanvi. How old is Vihaan? (a) 8 (b) 14 (c) not enough info (d) 15
7. 7.🧩 Ananya bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹20
8. 8.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
9. 9.🧩 Nisha is 11 years old. Ananya is older than Nisha. How old is Ananya? (a) not enough info (b) 16 (c) 12 (d) 13
10. 10.🧩 Kabir bought 2 mangoes and a cap for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹78 (b) ₹80 (c) not enough info (d) ₹40
11. 11.🥭 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, it is certain (c) yes, mangoes match (d) no, check more
12. 12.🧩 Meera is 12 years old. Tara is 3 years older than Meera. How old is Tara? (a) not enough info (b) 16 (c) 3 (d) 15
13. 13.🧩 Vihaan bought 3 kites and a water bottle for ₹230 in all. Each kite cost the same. What did one kite cost? (a) ₹230 (b) ₹227 (c) ₹76 (d) not enough info
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
15. 15.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
17. 17.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
18. 18.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Rohan is 7 years old. Ananya is 7 years older than Rohan. How old is Ananya? (a) not enough info (b) 15 (c) 14 (d) 7
20. 20.🧩 Nisha bought 3 markers and a lunch box for ₹200 in all. Each marker cost the same. What did one marker cost? (a) ₹197 (b) ₹66 (c) not enough info (d) ₹200
21. 21.🧩 Kabir bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹60
22. 22.🧩 Ananya bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹50 (c) ₹55 (d) not enough info
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
24. 24.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
25. 25.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
26. 26.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
27. 27.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
28. 28.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 5 PM (c) 2 PM (d) not enough info
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Kabir bought 6 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹300
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Ananya bought 6 mangoes for ₹210 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹210 (c) not enough info (d) ₹40
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Saanvi bought 3 kites and a water bottle for ₹85 in all. Each kite cost the same. What did one kite cost? (a) ₹85 (b) ₹28 (c) ₹82 (d) not enough info
35. 35.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
36. 36.🧩 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
37. 37.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
38. 38.🧩 Tara is 8 years old. Kabir is 7 years older than Tara. How old is Kabir? (a) not enough info (b) 16 (c) 15 (d) 7
39. 39.🧩 Aarav 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
40. 40.🧩 Aarav is 7 years old. Arjun is older than Aarav. How old is Arjun? (a) 8 (b) 12 (c) not enough info (d) 9

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