Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 328 · 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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
2. 2.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) not enough info (c) 5 (d) 10
3. 3.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
4. 4.🧩 Arjun is 6 years old. Aarav is older than Arjun. How old is Aarav? (a) 8 (b) 7 (c) not enough info (d) 11
5. 5.🥭 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, check more (d) no mango is sweet
6. 6.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
9. 9.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
10. 10.🧩 Kabir bought 6 notebooks for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) ₹270 (b) not enough info (c) ₹45 (d) ₹50
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
12. 12.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 16 (b) 80 (c) 8 (d) not enough info
13. 13.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
15. 15.🧩 Rohan bought 6 mangoes and a cap for ₹300 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹294 (c) ₹50 (d) ₹300
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.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
18. 18.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
19. 19.🧩 Rohan bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹270 (d) ₹50
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
21. 21.🧩 Meera bought 2 balls for ₹70 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹40 (c) ₹70 (d) ₹35
22. 22.🧩 A box has 6 rows of apples, with 9 in each row. How many apples are in the box? (a) 54 (b) not enough info (c) 63 (d) 15
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
24. 24.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 2 PM (d) 5 PM
25. 25.🧩 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
26. 26.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
28. 28.🧩 Tara is 11 years old. Diya is 2 years older than Tara. How old is Diya? (a) not enough info (b) 2 (c) 14 (d) 13
29. 29.🧩 Aarav bought 4 pens for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹180 (b) ₹50 (c) ₹45 (d) not enough info
30. 30.🧩 A box has 7 rows of apples, with 9 in each row. How many apples are in the box? (a) not enough info (b) 72 (c) 16 (d) 63
31. 31.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
33. 33.🧩 Vihaan is 6 years old. Arjun is 2 years older than Vihaan. How old is Arjun? (a) 8 (b) not enough info (c) 9 (d) 2
34. 34.🧩 Ishaan is 9 years old. Tara is 2 years older than Ishaan. How old is Tara? (a) 11 (b) 2 (c) 12 (d) not enough info
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 6 PM
37. 37.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
38. 38.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 4 PM
39. 39.🧩 Diya is 7 years old. Saanvi is 5 years older than Diya. How old is Saanvi? (a) 5 (b) 13 (c) not enough info (d) 12
40. 40.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence

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