Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 625 · 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.” gives enough evidence. (a) False (b) True
2. 2.🧩 Arjun is 7 years old. Nisha is 6 years older than Arjun. How old is Nisha? (a) 14 (b) not enough info (c) 13 (d) 6
3. 3.🧩 Arjun is 11 years old. Meera is 6 years older than Arjun. How old is Meera? (a) 6 (b) not enough info (c) 17 (d) 18
4. 4.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
6. 6.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to waste time (d) to change answers
7. 7.🧩 Ananya bought 4 kites for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹140 (c) not enough info (d) ₹40
8. 8.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
9. 9.🧩 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
10. 10.🧩 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
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.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM
13. 13.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
14. 14.🧩 Vihaan bought 6 markers and a bag for ₹300 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹300 (c) ₹50 (d) ₹294
15. 15.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 3 PM
16. 16.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
18. 18.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
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
22. 22.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
23. 23.🧩 Tara is 9 years old. Nisha is older than Tara. How old is Nisha? (a) not enough info (b) 11 (c) 14 (d) 10
24. 24.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
25. 25.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
31. 31.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
32. 32.🧩 Tara bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹110 (d) ₹55
33. 33.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
34. 34.🧩 Rohan bought 2 mangoes and a cap for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹170 (b) not enough info (c) ₹168 (d) ₹85
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
37. 37.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) not enough info (b) 80 (c) 8 (d) 16
38. 38.🧩 Arjun is 10 years old. Rohan is older than Arjun. How old is Rohan? (a) 11 (b) 12 (c) not enough info (d) 15
39. 39.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
40. 40.🧩 Vihaan is 10 years old. Aarav is 5 years older than Vihaan. How old is Aarav? (a) 15 (b) not enough info (c) 16 (d) 5

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