Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 205 · 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.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
5. 5.🧩 Arjun is 12 years old. Meera is older than Arjun. How old is Meera? (a) 14 (b) not enough info (c) 17 (d) 13
6. 6.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Nisha bought 6 kites and a cap for ₹390 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) not enough info (c) ₹384 (d) ₹390
9. 9.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Vihaan bought 2 markers and a lunch box for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹30 (c) not enough info (d) ₹58
12. 12.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info
13. 13.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 48 (c) 14 (d) 54
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
16. 16.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
18. 18.🧩 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
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
20. 20.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
22. 22.🧩 Kabir is 11 years old. Nisha is 8 years older than Kabir. How old is Nisha? (a) 20 (b) 19 (c) not enough info (d) 8
23. 23.🧩 Tara bought 5 mangoes and a cap for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) not enough info (c) ₹150 (d) ₹145
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
26. 26.🧩 Ishaan bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) not enough info (c) ₹45 (d) ₹50
27. 27.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Saanvi is 12 years old. Tara is older than Saanvi. How old is Tara? (a) 14 (b) 13 (c) not enough info (d) 17
29. 29.🧩 Ananya bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹300 (b) ₹55 (c) not enough info (d) ₹50
30. 30.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 9 PM
31. 31.🧩 Diya bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹30 (c) ₹20 (d) not enough info
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
33. 33.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
34. 34.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
35. 35.🧩 Ananya is 7 years old. Ishaan is older than Ananya. How old is Ishaan? (a) 8 (b) 9 (c) not enough info (d) 12
36. 36.🧩 Nisha is 12 years old. Arjun is older than Nisha. How old is Arjun? (a) 17 (b) 14 (c) not enough info (d) 13
37. 37.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
38. 38.🧩 Nisha bought 5 mangoes and a lunch box for ₹70 in all. Each mango cost the same. What did one mango cost? (a) ₹70 (b) ₹14 (c) not enough info (d) ₹65
39. 39.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
40. 40.🧩 Ishaan is 11 years old. Ananya is older than Ishaan. How old is Ananya? (a) 13 (b) 12 (c) not enough info (d) 16

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