Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 401 · 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) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
2. 2.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 6 PM
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
4. 4.🧩 Nisha is 10 years old. Vihaan is older than Nisha. How old is Vihaan? (a) 11 (b) 15 (c) 12 (d) not enough info
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
6. 6.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 8 (c) not enough info (d) 80
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
9. 9.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) not enough info (b) 80 (c) 8 (d) 16
10. 10.🧩 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
11. 11.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
14. 14.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 4 PM (d) not enough info
15. 15.🧩 Tara is 7 years old. Ananya is 6 years older than Tara. How old is Ananya? (a) 13 (b) 6 (c) not enough info (d) 14
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
17. 17.🧩 Ananya bought 3 balls and a cap for ₹165 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹162 (c) ₹55 (d) ₹165
18. 18.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 5 PM
19. 19.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
21. 21.🧩 Kabir bought 3 pens for ₹165 in all. Each pen cost the same. What did one pen cost? (a) ₹165 (b) ₹60 (c) not enough info (d) ₹55
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
23. 23.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 40 (b) 13 (c) 48 (d) not enough info
24. 24.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
25. 25.🧩 Aarav bought 3 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) ₹10 (c) ₹30 (d) not enough info
26. 26.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
28. 28.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 6 PM (c) 7 PM (d) not enough info
29. 29.🧩 Nisha bought 3 balls and a water bottle for ₹75 in all. Each ball cost the same. What did one ball cost? (a) ₹72 (b) ₹75 (c) not enough info (d) ₹25
30. 30.🧩 Diya is 11 years old. Tara is older than Diya. How old is Tara? (a) not enough info (b) 16 (c) 13 (d) 12
31. 31.🧩 Diya is 11 years old. Nisha is 5 years older than Diya. How old is Nisha? (a) not enough info (b) 5 (c) 17 (d) 16
32. 32.🧩 Tara is 8 years old. Diya is 2 years older than Tara. How old is Diya? (a) 10 (b) not enough info (c) 2 (d) 11
33. 33.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
34. 34.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
36. 36.🧩 A box has 6 rows of oranges, with 7 in each row. How many oranges are in the box? (a) not enough info (b) 42 (c) 49 (d) 13
37. 37.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
38. 38.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
39. 39.🧩 Meera is 8 years old. Aarav is 9 years older than Meera. How old is Aarav? (a) 18 (b) 9 (c) not enough info (d) 17
40. 40.🧩 Ishaan is 7 years old. Arjun is 5 years older than Ishaan. How old is Arjun? (a) 13 (b) not enough info (c) 5 (d) 12

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