Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 481 · 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.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
2. 2.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
3. 3.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
5. 5.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
6. 6.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Nisha bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹70 (b) not enough info (c) ₹40 (d) ₹35
9. 9.🧩 Diya bought 3 balls for ₹45 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹45
10. 10.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 12 (b) not enough info (c) 6 (d) 60
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
14. 14.🧩 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
15. 15.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Rohan bought 2 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹100 (c) ₹55 (d) not enough info
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
24. 24.🧩 Nisha is 6 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 11 (b) not enough info (c) 8 (d) 7
25. 25.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
26. 26.🧩 Aarav is 7 years old. Rohan is 3 years older than Aarav. How old is Rohan? (a) 3 (b) not enough info (c) 11 (d) 10
27. 27.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
28. 28.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
29. 29.🧩 Diya is 6 years old. Saanvi is 8 years older than Diya. How old is Saanvi? (a) not enough info (b) 15 (c) 8 (d) 14
30. 30.🧩 Arjun bought 3 notebooks and a lunch box for ₹125 in all. Each notebook cost the same. What did one notebook cost? (a) ₹122 (b) ₹125 (c) ₹41 (d) not enough info
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
32. 32.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) no mango is sweet (d) yes, it is certain
33. 33.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
34. 34.🧩 A box has 4 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 10 (c) 24 (d) 30
35. 35.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
38. 38.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 7 PM (d) 8 PM
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence

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