Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 664 · 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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
2. 2.🧩 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
3. 3.🧩 Ishaan bought 4 pens and a bag for ₹190 in all. Each pen cost the same. What did one pen cost? (a) ₹186 (b) ₹190 (c) not enough info (d) ₹47
4. 4.🧩 Ananya bought 3 mangoes and a water bottle for ₹115 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹38 (c) ₹112 (d) ₹115
5. 5.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 9 PM
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
7. 7.🧩 Kabir bought 4 pens and a water bottle for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹196 (b) not enough info (c) ₹50 (d) ₹200
8. 8.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 8 PM (c) 6 PM (d) not enough info
9. 9.🧩 Ishaan is 12 years old. Ananya is older than Ishaan. How old is Ananya? (a) 17 (b) 13 (c) 14 (d) not enough info
10. 10.🧩 Nisha bought 2 markers and a cap for ₹170 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹85 (c) ₹170 (d) ₹168
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Rohan bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) ₹40 (c) ₹25 (d) not enough info
16. 16.🧩 Meera bought 2 notebooks and a water bottle for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹100 (c) ₹200 (d) ₹198
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
20. 20.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
22. 22.🧩 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
23. 23.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 5 PM
24. 24.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
25. 25.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
26. 26.🧩 Aarav bought 2 notebooks and a bag for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹160 (b) ₹158 (c) not enough info (d) ₹80
27. 27.🧩 Nisha is 10 years old. Kabir is 2 years older than Nisha. How old is Kabir? (a) 13 (b) 12 (c) not enough info (d) 2
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
29. 29.🥭 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) no mango is sweet (c) no, check more (d) yes, it is certain
30. 30.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 16 (c) not enough info (d) 8
31. 31.🧩 Nisha bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹90 (d) ₹45
32. 32.🧩 Diya is 12 years old. Rohan is older than Diya. How old is Rohan? (a) 14 (b) 13 (c) 17 (d) not enough info
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
34. 34.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 11 (c) 24 (d) 32
35. 35.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
36. 36.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
38. 38.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
39. 39.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
40. 40.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 90 (c) not enough info (d) 18

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