Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 142 · 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: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
2. 2.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
3. 3.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
4. 4.🧩 A box has 3 rows of apples, with 9 in each row. How many apples are in the box? (a) 27 (b) 12 (c) not enough info (d) 36
5. 5.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 2 PM (d) 4 PM
6. 6.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
7. 7.📊 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
8. 8.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
9. 9.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
10. 10.🧩 A box has 7 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 40 (b) 35 (c) not enough info (d) 12
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
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.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
16. 16.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
17. 17.🧩 Kabir is 7 years old. Ishaan is 2 years older than Kabir. How old is Ishaan? (a) 2 (b) 10 (c) 9 (d) not enough info
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Nisha is 12 years old. Ishaan is 4 years older than Nisha. How old is Ishaan? (a) 4 (b) 16 (c) 17 (d) not enough info
20. 20.🧩 Vihaan is 12 years old. Diya is older than Vihaan. How old is Diya? (a) 13 (b) not enough info (c) 14 (d) 17
21. 21.🧩 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
22. 22.🧩 Vihaan bought 5 kites and a water bottle for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹36 (b) ₹175 (c) ₹180 (d) not enough info
23. 23.🥭 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) yes, it is certain (d) no, check more
24. 24.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
26. 26.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
27. 27.🧩 Ishaan is 7 years old. Aarav is 7 years older than Ishaan. How old is Aarav? (a) 7 (b) not enough info (c) 15 (d) 14
28. 28.🧩 Diya bought 2 markers and a bag for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹158 (b) ₹160 (c) not enough info (d) ₹80
29. 29.🧩 Diya is 8 years old. Arjun is 4 years older than Diya. How old is Arjun? (a) 13 (b) 4 (c) not enough info (d) 12
30. 30.🧩 Aarav bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹180 (c) ₹35 (d) ₹30
31. 31.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
33. 33.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
34. 34.🧩 Ananya bought 5 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹25 (c) not enough info (d) ₹20
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
37. 37.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
38. 38.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
39. 39.🧩 Arjun bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) ₹25 (c) ₹20 (d) not enough info
40. 40.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence

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