Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 730 · 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.🧩 Aarav is 11 years old. Vihaan is 7 years older than Aarav. How old is Vihaan? (a) 19 (b) 7 (c) 18 (d) not enough info
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
5. 5.🧩 Vihaan is 11 years old. Saanvi is 3 years older than Vihaan. How old is Saanvi? (a) 14 (b) 15 (c) 3 (d) not enough info
6. 6.🧩 Rohan is 10 years old. Ishaan is older than Rohan. How old is Ishaan? (a) 12 (b) 15 (c) 11 (d) not enough info
7. 7.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) not enough info (c) 40 (d) 8
8. 8.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
9. 9.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) not enough info (c) 3 PM (d) 4 PM
10. 10.🧩 Kabir is 7 years old. Tara is older than Kabir. How old is Tara? (a) 9 (b) 8 (c) not enough info (d) 12
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
14. 14.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
15. 15.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
17. 17.🥭 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, mangoes match (d) yes, it is certain
18. 18.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
22. 22.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 28 (b) 24 (c) 10 (d) not enough info
23. 23.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
24. 24.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
25. 25.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
26. 26.🧩 A box has 8 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 32 (c) 12 (d) 36
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Ananya bought 6 notebooks and a bag for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹150 (c) ₹144 (d) ₹25
29. 29.🧩 Arjun bought 3 notebooks and a water bottle for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) ₹237 (c) not enough info (d) ₹240
30. 30.🧩 A box has 7 rows of apples, with 7 in each row. How many apples are in the box? (a) 14 (b) not enough info (c) 49 (d) 56
31. 31.🧩 Saanvi bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹100 (d) ₹55
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.🧩 Vihaan is 8 years old. Ishaan is older than Vihaan. How old is Ishaan? (a) 9 (b) 13 (c) 10 (d) not enough info
34. 34.🧩 Diya is 11 years old. Tara is 7 years older than Diya. How old is Tara? (a) 7 (b) 18 (c) not enough info (d) 19
35. 35.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 9 PM (d) 8 PM
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
37. 37.🧩 A box has 3 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 11 (b) not enough info (c) 32 (d) 24
38. 38.🧩 Diya bought 4 notebooks and a bag for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹236 (b) ₹240 (c) ₹60 (d) not enough info
39. 39.🧩 Ishaan is 12 years old. Vihaan is 4 years older than Ishaan. How old is Vihaan? (a) 4 (b) 17 (c) 16 (d) not enough info
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True

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