Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 610 · 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: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
2. 2.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
3. 3.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🧩 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
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
7. 7.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
8. 8.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
9. 9.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 9 PM (d) 8 PM
10. 10.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
12. 12.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
13. 13.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) 6 PM (d) not enough info
14. 14.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
15. 15.🧩 Ishaan is 12 years old. Kabir is older than Ishaan. How old is Kabir? (a) 14 (b) 17 (c) not enough info (d) 13
16. 16.🧩 Ishaan bought 2 kites for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) ₹35 (c) not enough info (d) ₹70
17. 17.🧩 Tara bought 3 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) not enough info (c) ₹120 (d) ₹45
18. 18.🧩 Arjun bought 3 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹90
19. 19.🧩 Arjun bought 3 markers for ₹105 in all. Each marker cost the same. What did one marker cost? (a) ₹105 (b) not enough info (c) ₹40 (d) ₹35
20. 20.🧩 Kabir bought 3 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹60 (c) ₹25 (d) ₹20
21. 21.🧩 Aarav bought 6 pens for ₹360 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) not enough info (c) ₹360 (d) ₹65
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
24. 24.🧩 Vihaan is 6 years old. Diya is older than Vihaan. How old is Diya? (a) 7 (b) 11 (c) not enough info (d) 8
25. 25.🧩 Vihaan bought 5 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹75
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
27. 27.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
29. 29.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 15 (b) 8 (c) not enough info (d) 20
30. 30.🧩 Arjun is 8 years old. Tara is older than Arjun. How old is Tara? (a) not enough info (b) 13 (c) 9 (d) 10
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
33. 33.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
35. 35.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
36. 36.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Meera is 7 years old. Aarav is older than Meera. How old is Aarav? (a) 8 (b) 9 (c) not enough info (d) 12
38. 38.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
39. 39.🧩 Saanvi is 10 years old. Nisha is 8 years older than Saanvi. How old is Nisha? (a) 19 (b) not enough info (c) 8 (d) 18
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True

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