Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 524 · 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.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
2. 2.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
4. 4.🥭 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
5. 5.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
7. 7.🧩 Meera is 12 years old. Vihaan is 8 years older than Meera. How old is Vihaan? (a) 20 (b) 21 (c) not enough info (d) 8
8. 8.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
10. 10.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
11. 11.🧩 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
12. 12.🧩 Nisha bought 3 balls for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹165 (c) not enough info (d) ₹55
13. 13.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 7 PM
14. 14.🧩 Vihaan is 9 years old. Ishaan is 8 years older than Vihaan. How old is Ishaan? (a) 18 (b) 17 (c) 8 (d) not enough info
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
16. 16.🧩 Nisha bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) not enough info (c) ₹60 (d) ₹10
17. 17.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
18. 18.🧩 Meera is 10 years old. Aarav is older than Meera. How old is Aarav? (a) 11 (b) not enough info (c) 12 (d) 15
19. 19.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
20. 20.🧩 Kabir is 9 years old. Ananya is 6 years older than Kabir. How old is Ananya? (a) 15 (b) not enough info (c) 6 (d) 16
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.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
23. 23.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 30 (b) not enough info (c) 10 (d) 24
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
25. 25.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
26. 26.🧩 Rohan is 11 years old. Aarav is older than Rohan. How old is Aarav? (a) not enough info (b) 16 (c) 13 (d) 12
27. 27.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
28. 28.🧩 Arjun bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹50 (d) ₹225
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
31. 31.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
33. 33.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 36 (d) 32
34. 34.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 3 PM
35. 35.🧩 Tara is 7 years old. Rohan is 5 years older than Tara. How old is Rohan? (a) 5 (b) 13 (c) not enough info (d) 12
36. 36.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
38. 38.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
39. 39.🧩 Arjun is 12 years old. Vihaan is older than Arjun. How old is Vihaan? (a) not enough info (b) 13 (c) 14 (d) 17
40. 40.🧩 Tara is 7 years old. Meera is 7 years older than Tara. How old is Meera? (a) 14 (b) not enough info (c) 7 (d) 15

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