Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 478 · 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 12 years old. Ishaan is 2 years older than Vihaan. How old is Ishaan? (a) 2 (b) 15 (c) not enough info (d) 14
2. 2.🧩 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
3. 3.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) 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.🧩 Diya is 9 years old. Meera is older than Diya. How old is Meera? (a) 10 (b) not enough info (c) 14 (d) 11
7. 7.🥭 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) no, check more (d) yes, mangoes match
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
9. 9.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
10. 10.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) 70 (c) not enough info (d) 7
11. 11.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
12. 12.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
13. 13.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 5 PM
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
15. 15.🧩 Diya bought 5 mangoes for ₹250 in all. Each mango cost the same. What did one mango cost? (a) ₹250 (b) ₹55 (c) not enough info (d) ₹50
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
18. 18.🧩 Ananya bought 4 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) ₹25 (c) ₹30 (d) not enough info
19. 19.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Arjun bought 5 notebooks and a bag for ₹230 in all. Each notebook cost the same. What did one notebook cost? (a) ₹230 (b) ₹46 (c) not enough info (d) ₹225
22. 22.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 9 PM
23. 23.🧩 Kabir bought 3 mangoes and a bag for ₹270 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹90 (c) ₹270 (d) ₹267
24. 24.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
25. 25.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
26. 26.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 2 PM (d) 4 PM
27. 27.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
29. 29.🧩 Ishaan bought 2 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹25 (c) not enough info (d) ₹30
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
32. 32.🧩 Ishaan is 10 years old. Diya is older than Ishaan. How old is Diya? (a) not enough info (b) 12 (c) 11 (d) 15
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
34. 34.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
36. 36.🧩 Tara bought 2 kites and a lunch box for ₹200 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹200 (c) ₹198 (d) ₹100
37. 37.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 8 PM (c) 4 PM (d) not enough info
38. 38.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
39. 39.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
40. 40.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) not enough info (c) 40 (d) 8

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