Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 170 · 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.” gives enough evidence. (a) False (b) True
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
3. 3.🧩 Tara bought 5 markers and a cap for ₹135 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹135 (c) ₹27 (d) ₹130
4. 4.🧩 Arjun is 12 years old. Nisha is older than Arjun. How old is Nisha? (a) 14 (b) 17 (c) 13 (d) not enough info
5. 5.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Vihaan is 12 years old. Diya is 8 years older than Vihaan. How old is Diya? (a) 20 (b) 21 (c) not enough info (d) 8
7. 7.📊 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
8. 8.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 4 (c) 8 (d) 40
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
10. 10.🧩 Arjun bought 6 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) ₹60 (c) not enough info (d) ₹15
11. 11.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Vihaan bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) not enough info (c) ₹15 (d) ₹20
14. 14.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
16. 16.🧩 Kabir is 6 years old. Tara is 6 years older than Kabir. How old is Tara? (a) 6 (b) 13 (c) not enough info (d) 12
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Arjun is 7 years old. Meera is 3 years older than Arjun. How old is Meera? (a) 3 (b) 11 (c) 10 (d) not enough info
20. 20.🧩 Aarav bought 3 mangoes and a water bottle for ₹125 in all. Each mango cost the same. What did one mango cost? (a) ₹41 (b) ₹125 (c) ₹122 (d) not enough info
21. 21.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 5 PM
22. 22.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
23. 23.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) 11 (b) 30 (c) 35 (d) not enough info
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
27. 27.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
28. 28.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
29. 29.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 4 PM
30. 30.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 40 (b) 13 (c) 45 (d) not enough info
31. 31.🧩 Meera is 6 years old. Vihaan is older than Meera. How old is Vihaan? (a) not enough info (b) 8 (c) 11 (d) 7
32. 32.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
33. 33.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
34. 34.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
35. 35.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
36. 36.🥭 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
37. 37.🧩 Arjun bought 5 notebooks and a lunch box for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹36 (b) not enough info (c) ₹175 (d) ₹180
38. 38.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 30 (b) not enough info (c) 10 (d) 25
39. 39.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 40 (d) 4
40. 40.🧩 Aarav bought 6 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹55 (c) ₹300 (d) ₹50

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