Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 491 · 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.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
2. 2.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
3. 3.🧩 Nisha bought 4 pens and a water bottle for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹96 (c) ₹100 (d) ₹25
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.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
7. 7.🧩 Ananya is 10 years old. Ishaan is older than Ananya. How old is Ishaan? (a) 15 (b) 11 (c) not enough info (d) 12
8. 8.🧩 Diya is 9 years old. Meera is 4 years older than Diya. How old is Meera? (a) 14 (b) not enough info (c) 4 (d) 13
9. 9.🧩 Rohan is 11 years old. Meera is 3 years older than Rohan. How old is Meera? (a) not enough info (b) 15 (c) 14 (d) 3
10. 10.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
11. 11.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
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Nisha is 11 years old. Ananya is 6 years older than Nisha. How old is Ananya? (a) 17 (b) 6 (c) not enough info (d) 18
15. 15.🧩 Arjun is 8 years old. Vihaan is 9 years older than Arjun. How old is Vihaan? (a) 17 (b) not enough info (c) 9 (d) 18
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
17. 17.🧩 Meera bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) not enough info (c) ₹300 (d) ₹55
18. 18.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 5 PM
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
22. 22.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Ishaan bought 2 kites and a bag for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹158 (c) not enough info (d) ₹160
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
25. 25.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
29. 29.🧩 Ananya bought 2 mangoes and a water bottle for ₹160 in all. Each mango cost the same. What did one mango cost? (a) ₹80 (b) not enough info (c) ₹158 (d) ₹160
30. 30.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) not enough info (c) 40 (d) 8
31. 31.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Aarav bought 5 notebooks and a cap for ₹290 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹58 (c) ₹290 (d) ₹285
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
35. 35.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
36. 36.🧩 Diya is 12 years old. Tara is 5 years older than Diya. How old is Tara? (a) 18 (b) not enough info (c) 17 (d) 5
37. 37.🧩 Meera bought 5 pens and a lunch box for ₹145 in all. Each pen cost the same. What did one pen cost? (a) ₹29 (b) ₹145 (c) ₹140 (d) not enough info
38. 38.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
39. 39.🧩 A box has 3 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 7 (d) 16
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False

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