Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 950 · 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.🧩 Vihaan bought 2 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹30 (c) ₹20 (d) ₹15
2. 2.🧩 Rohan bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹55 (c) not enough info (d) ₹165
3. 3.🧩 Tara is 11 years old. Diya is older than Tara. How old is Diya? (a) 12 (b) 13 (c) not enough info (d) 16
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.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
6. 6.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
7. 7.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
8. 8.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
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
11. 11.🧩 Arjun bought 4 mangoes and a cap for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹166 (b) ₹170 (c) ₹42 (d) not enough info
12. 12.🧩 Tara bought 3 kites and a water bottle for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹147 (b) not enough info (c) ₹50 (d) ₹150
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
15. 15.🧩 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
16. 16.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
17. 17.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
19. 19.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 15 (c) 8 (d) 20
20. 20.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
21. 21.🧩 Kabir is 9 years old. Aarav is 3 years older than Kabir. How old is Aarav? (a) 3 (b) 12 (c) 13 (d) not enough info
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
23. 23.🧩 Vihaan bought 4 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹60
24. 24.🧩 Diya bought 4 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) ₹45 (c) ₹50 (d) not enough info
25. 25.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
26. 26.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
27. 27.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 2 PM
28. 28.🧩 Nisha is 11 years old. Kabir is 5 years older than Nisha. How old is Kabir? (a) not enough info (b) 17 (c) 16 (d) 5
29. 29.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
32. 32.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
33. 33.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 7 PM
34. 34.🧩 A box has 6 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 14 (b) 56 (c) not enough info (d) 48
35. 35.🧩 Saanvi is 6 years old. Arjun is older than Saanvi. How old is Arjun? (a) 11 (b) 7 (c) not enough info (d) 8
36. 36.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
37. 37.🧩 A box has 3 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 24 (b) not enough info (c) 9 (d) 18
38. 38.🧩 Ananya is 12 years old. Vihaan is older than Ananya. How old is Vihaan? (a) 17 (b) 14 (c) 13 (d) not enough info
39. 39.🧩 Meera is 7 years old. Aarav is older than Meera. How old is Aarav? (a) not enough info (b) 8 (c) 9 (d) 12
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False

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