Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 393 · 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.📊 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
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Ananya bought 2 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹30 (c) not enough info (d) ₹35
4. 4.🧩 Rohan bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) not enough info (c) ₹20 (d) ₹15
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
8. 8.🐕 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
9. 9.🧩 Meera is 10 years old. Diya is older than Meera. How old is Diya? (a) not enough info (b) 15 (c) 11 (d) 12
10. 10.🧩 Meera bought 4 markers and a cap for ₹290 in all. Each marker cost the same. What did one marker cost? (a) ₹290 (b) ₹286 (c) not enough info (d) ₹72
11. 11.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
12. 12.🧩 A box has 5 rows of apples, with 8 in each row. How many apples are in the box? (a) 13 (b) not enough info (c) 48 (d) 40
13. 13.🧩 Rohan is 10 years old. Aarav is older than Rohan. How old is Aarav? (a) 12 (b) 11 (c) 15 (d) not enough info
14. 14.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
16. 16.🧩 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
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
19. 19.🧩 Diya is 6 years old. Nisha is 4 years older than Diya. How old is Nisha? (a) 4 (b) 11 (c) not enough info (d) 10
20. 20.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
21. 21.🧩 Diya is 7 years old. Ananya is 9 years older than Diya. How old is Ananya? (a) not enough info (b) 17 (c) 9 (d) 16
22. 22.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 80 (c) 8 (d) 16
23. 23.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
25. 25.🧩 Diya bought 6 notebooks and a lunch box for ₹290 in all. Each notebook cost the same. What did one notebook cost? (a) ₹290 (b) ₹284 (c) ₹48 (d) not enough info
26. 26.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
27. 27.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 7 PM
28. 28.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
29. 29.🧩 Tara is 7 years old. Nisha is 4 years older than Tara. How old is Nisha? (a) 12 (b) not enough info (c) 4 (d) 11
30. 30.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) not enough info (d) 5 PM
31. 31.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
32. 32.🧩 Rohan bought 2 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹90 (b) ₹45 (c) ₹50 (d) not enough info
33. 33.🧩 Kabir is 10 years old. Ishaan is 5 years older than Kabir. How old is Ishaan? (a) not enough info (b) 16 (c) 15 (d) 5
34. 34.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
35. 35.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
36. 36.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 28 (b) 11 (c) not enough info (d) 32
37. 37.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 7 PM (d) 6 PM
38. 38.🧩 Ananya bought 3 pens and a lunch box for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹110 (b) not enough info (c) ₹107 (d) ₹36
39. 39.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 4 PM
40. 40.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) not enough info (b) 8 (c) 80 (d) 16

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