Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 849 · 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.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
2. 2.🧩 Vihaan is 7 years old. Ananya is 3 years older than Vihaan. How old is Ananya? (a) 11 (b) not enough info (c) 10 (d) 3
3. 3.🧩 Diya is 12 years old. Tara is 7 years older than Diya. How old is Tara? (a) 19 (b) 20 (c) not enough info (d) 7
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Nisha bought 3 kites and a cap for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹240 (c) not enough info (d) ₹237
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Diya bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹220 (c) ₹60 (d) ₹55
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
9. 9.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
11. 11.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
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 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 5 PM (d) 9 PM
14. 14.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
15. 15.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
16. 16.🧩 Meera bought 4 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) ₹40 (c) not enough info (d) ₹10
17. 17.🧩 Nisha bought 6 notebooks and a bag for ₹390 in all. Each notebook cost the same. What did one notebook cost? (a) ₹390 (b) ₹65 (c) ₹384 (d) not enough info
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
19. 19.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
20. 20.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
21. 21.🧩 Kabir bought 6 kites for ₹330 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹330 (c) ₹55 (d) ₹60
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
23. 23.🧩 Ishaan bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) ₹10 (b) not enough info (c) ₹20 (d) ₹15
24. 24.🧩 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
25. 25.🧩 Saanvi is 7 years old. Ishaan is 7 years older than Saanvi. How old is Ishaan? (a) 15 (b) 7 (c) not enough info (d) 14
26. 26.🧩 A box has 8 rows of apples, with 6 in each row. How many apples are in the box? (a) 48 (b) not enough info (c) 54 (d) 14
27. 27.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
28. 28.🧩 Ananya bought 6 mangoes and a cap for ₹270 in all. Each mango cost the same. What did one mango cost? (a) ₹264 (b) ₹45 (c) not enough info (d) ₹270
29. 29.🧩 Nisha bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) not enough info (c) ₹55 (d) ₹50
30. 30.🧩 Rohan is 7 years old. Aarav is older than Rohan. How old is Aarav? (a) 12 (b) not enough info (c) 8 (d) 9
31. 31.🧩 Meera is 7 years old. Rohan is 8 years older than Meera. How old is Rohan? (a) 16 (b) not enough info (c) 8 (d) 15
32. 32.🧩 Ananya is 10 years old. Nisha is older than Ananya. How old is Nisha? (a) 15 (b) 12 (c) 11 (d) not enough info
33. 33.🧩 Arjun bought 2 notebooks and a bag for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹48 (b) ₹25 (c) ₹50 (d) not enough info
34. 34.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
35. 35.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
37. 37.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
38. 38.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
40. 40.🧩 Arjun is 6 years old. Kabir is 2 years older than Arjun. How old is Kabir? (a) not enough info (b) 2 (c) 9 (d) 8

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