Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 494 · 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? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Arjun is 9 years old. Kabir is 7 years older than Arjun. How old is Kabir? (a) 16 (b) 17 (c) not enough info (d) 7
4. 4.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box has 5 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 42 (b) 35 (c) not enough info (d) 12
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
9. 9.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
10. 10.🧩 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
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
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.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Aarav bought 3 mangoes and a bag for ₹145 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) ₹145 (c) ₹142 (d) not enough info
16. 16.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
17. 17.🧩 Meera bought 2 balls and a cap for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹88 (b) ₹45 (c) not enough info (d) ₹90
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
19. 19.🧩 Aarav is 11 years old. Saanvi is 8 years older than Aarav. How old is Saanvi? (a) 8 (b) 20 (c) not enough info (d) 19
20. 20.🧩 Vihaan is 10 years old. Saanvi is 4 years older than Vihaan. How old is Saanvi? (a) not enough info (b) 4 (c) 14 (d) 15
21. 21.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
22. 22.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
23. 23.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 12 (b) 16 (c) not enough info (d) 7
24. 24.🧩 Tara bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹80
25. 25.📊 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
26. 26.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 5 PM
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
29. 29.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
30. 30.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 16 (b) not enough info (c) 8 (d) 20
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
32. 32.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
33. 33.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
35. 35.🧩 Rohan bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹110 (b) ₹60 (c) not enough info (d) ₹55
36. 36.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) 32 (b) 11 (c) 24 (d) not enough info
37. 37.🧩 Diya is 6 years old. Rohan is older than Diya. How old is Rohan? (a) 7 (b) not enough info (c) 8 (d) 11
38. 38.🧩 A box has 4 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 24 (b) 30 (c) 10 (d) not enough info
39. 39.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 8 PM (d) 7 PM
40. 40.🧩 A box has 6 rows of oranges, with 9 in each row. How many oranges are in the box? (a) not enough info (b) 15 (c) 63 (d) 54

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