Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 335 · 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.🧩 Saanvi is 11 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 16 (b) 13 (c) 12 (d) not enough info
2. 2.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
3. 3.🧩 Diya bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹35 (c) ₹60 (d) not enough info
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
6. 6.🥭 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, check more (d) no mango is sweet
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
9. 9.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Diya bought 5 pens and a cap for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹34 (b) ₹165 (c) not enough info (d) ₹170
12. 12.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
13. 13.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
14. 14.🧩 Tara is 10 years old. Meera is 6 years older than Tara. How old is Meera? (a) 16 (b) 17 (c) not enough info (d) 6
15. 15.🧩 Vihaan bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹55 (c) not enough info (d) ₹50
16. 16.🧩 Ishaan is 7 years old. Nisha is 9 years older than Ishaan. How old is Nisha? (a) not enough info (b) 16 (c) 17 (d) 9
17. 17.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
18. 18.🧩 Vihaan is 11 years old. Rohan is 4 years older than Vihaan. How old is Rohan? (a) 15 (b) 4 (c) not enough info (d) 16
19. 19.🧩 Ishaan bought 3 notebooks and a cap for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹207 (b) ₹210 (c) not enough info (d) ₹70
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
23. 23.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
25. 25.🧩 Rohan bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹30 (c) ₹15 (d) ₹20
26. 26.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Saanvi bought 3 markers and a cap for ₹60 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹20 (d) ₹57
28. 28.🧩 Rohan bought 6 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹20 (c) ₹15 (d) not enough info
29. 29.🧩 Diya is 8 years old. Vihaan is 3 years older than Diya. How old is Vihaan? (a) 3 (b) 12 (c) 11 (d) not enough info
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
31. 31.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
32. 32.🧩 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
33. 33.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
34. 34.🧩 Meera bought 2 notebooks for ₹20 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹10 (c) not enough info (d) ₹15
35. 35.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
36. 36.🧩 Meera is 10 years old. Arjun is older than Meera. How old is Arjun? (a) 12 (b) 11 (c) 15 (d) not enough info
37. 37.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) 36 (b) 32 (c) 12 (d) not enough info
38. 38.🧩 Aarav is 11 years old. Kabir is older than Aarav. How old is Kabir? (a) not enough info (b) 16 (c) 13 (d) 12
39. 39.🧩 A box has 5 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 9 (b) 20 (c) not enough info (d) 24
40. 40.🧩 Meera is 11 years old. Ananya is 2 years older than Meera. How old is Ananya? (a) 14 (b) not enough info (c) 2 (d) 13

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