Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 436 · 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: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
3. 3.🧩 A box has 4 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 45 (b) 36 (c) 13 (d) not enough info
4. 4.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
5. 5.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) 20 (b) 15 (c) not enough info (d) 8
6. 6.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
7. 7.🧩 Aarav bought 5 mangoes for ₹225 in all. Each mango cost the same. What did one mango cost? (a) ₹225 (b) not enough info (c) ₹45 (d) ₹50
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Ananya is 8 years old. Tara is older than Ananya. How old is Tara? (a) 13 (b) not enough info (c) 9 (d) 10
10. 10.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
11. 11.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
13. 13.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
14. 14.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
15. 15.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
16. 16.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
17. 17.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
19. 19.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 5 PM (c) 8 PM (d) not enough info
20. 20.🧩 Ananya bought 3 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹75
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Nisha bought 4 kites and a cap for ₹260 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) ₹260 (c) ₹256 (d) not enough info
24. 24.🧩 Diya is 12 years old. Rohan is older than Diya. How old is Rohan? (a) 17 (b) 13 (c) 14 (d) not enough info
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Meera bought 5 mangoes for ₹250 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹250 (c) ₹50 (d) ₹55
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
28. 28.🧩 Nisha is 11 years old. Tara is 3 years older than Nisha. How old is Tara? (a) 14 (b) 15 (c) 3 (d) not enough info
29. 29.🧩 Meera is 8 years old. Ishaan is 8 years older than Meera. How old is Ishaan? (a) 16 (b) 17 (c) not enough info (d) 8
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
32. 32.🧩 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
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
34. 34.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
35. 35.🧩 A box has 3 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 24 (b) not enough info (c) 18 (d) 9
36. 36.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
38. 38.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
39. 39.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
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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