Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 670 · 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 checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Kabir bought 4 kites and a bag for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹52 (b) ₹210 (c) ₹206 (d) not enough info
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) no mango is sweet (c) yes, it is certain (d) no, check more
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
6. 6.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) 7 PM (d) not enough info
7. 7.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
8. 8.🧩 Aarav is 7 years old. Kabir is older than Aarav. How old is Kabir? (a) 8 (b) 9 (c) not enough info (d) 12
9. 9.🧩 Ananya is 8 years old. Saanvi is older than Ananya. How old is Saanvi? (a) not enough info (b) 13 (c) 9 (d) 10
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
12. 12.🧩 Kabir bought 2 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹100
13. 13.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
14. 14.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
15. 15.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
16. 16.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
17. 17.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) not enough info (c) 8 (d) 80
18. 18.🧩 Aarav is 7 years old. Rohan is 2 years older than Aarav. How old is Rohan? (a) not enough info (b) 10 (c) 2 (d) 9
19. 19.🧩 Aarav is 6 years old. Diya is older than Aarav. How old is Diya? (a) 11 (b) 7 (c) 8 (d) not enough info
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box has 4 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 13 (b) 36 (c) 45 (d) not enough info
22. 22.🧩 Diya bought 6 kites for ₹360 in all. Each kite cost the same. What did one kite cost? (a) ₹360 (b) ₹65 (c) not enough info (d) ₹60
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
25. 25.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Saanvi is 11 years old. Diya is older than Saanvi. How old is Diya? (a) 13 (b) 12 (c) 16 (d) not enough info
28. 28.🧩 Kabir is 6 years old. Saanvi is 8 years older than Kabir. How old is Saanvi? (a) 14 (b) not enough info (c) 8 (d) 15
29. 29.🧩 Aarav bought 4 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹240 (d) ₹65
30. 30.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Nisha bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) not enough info (c) ₹25 (d) ₹20
32. 32.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Ananya is 6 years old. Saanvi is 4 years older than Ananya. How old is Saanvi? (a) 10 (b) 4 (c) not enough info (d) 11
34. 34.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 7 PM (c) 4 PM (d) not enough info
35. 35.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
36. 36.📊 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
37. 37.🧩 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
38. 38.🧩 Arjun is 6 years old. Tara is older than Arjun. How old is Tara? (a) 8 (b) 7 (c) 11 (d) not enough info
39. 39.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 27 (b) not enough info (c) 36 (d) 12
40. 40.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

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