Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 310 · 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: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
2. 2.🧩 Rohan is 10 years old. Arjun is older than Rohan. How old is Arjun? (a) not enough info (b) 11 (c) 12 (d) 15
3. 3.🧩 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
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
5. 5.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
6. 6.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
8. 8.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Kabir is 7 years old. Aarav is older than Kabir. How old is Aarav? (a) 8 (b) not enough info (c) 9 (d) 12
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
11. 11.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
13. 13.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
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
16. 16.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) not enough info (b) 5 (c) 50 (d) 10
17. 17.🧩 Arjun bought 6 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) not enough info (c) ₹25 (d) ₹20
18. 18.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
19. 19.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 7 PM
20. 20.🥭 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 mango is sweet (d) no, check more
21. 21.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) not enough info (d) 5 PM
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Ananya 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
24. 24.🧩 Ananya is 11 years old. Ishaan is 5 years older than Ananya. How old is Ishaan? (a) 16 (b) 17 (c) 5 (d) not enough info
25. 25.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
27. 27.🧩 A box has 4 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 20 (b) 25 (c) 9 (d) not enough info
28. 28.🧩 Diya bought 6 kites for ₹360 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹60 (c) ₹360 (d) ₹65
29. 29.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
30. 30.🧩 Vihaan bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹135 (b) ₹50 (c) ₹45 (d) not enough info
31. 31.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
32. 32.🧩 Diya is 7 years old. Saanvi is older than Diya. How old is Saanvi? (a) 8 (b) 12 (c) 9 (d) not enough info
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
34. 34.🧩 Rohan is 10 years old. Vihaan is 2 years older than Rohan. How old is Vihaan? (a) not enough info (b) 13 (c) 12 (d) 2
35. 35.📊 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
36. 36.🧩 Tara bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) ₹65 (c) not enough info (d) ₹60
37. 37.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
38. 38.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Ananya bought 6 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹240 (c) not enough info (d) ₹40

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