Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 483 · 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 has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 7 (c) 16 (d) 12
2. 2.🧩 Aarav bought 4 markers for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹40 (c) not enough info (d) ₹140
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
4. 4.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 2 PM (c) not enough info (d) 4 PM
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Kabir bought 6 mangoes and a cap for ₹270 in all. Each mango cost the same. What did one mango cost? (a) ₹264 (b) ₹270 (c) not enough info (d) ₹45
8. 8.🧩 Meera bought 3 markers for ₹30 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) ₹15 (c) not enough info (d) ₹30
9. 9.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
12. 12.🧩 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
13. 13.🧩 Meera bought 3 markers for ₹105 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹105 (d) ₹35
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
15. 15.🥭 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, it is certain (c) no, check more (d) yes, mangoes match
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
17. 17.🧩 A box has 7 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 72 (b) 63 (c) 16 (d) not enough info
18. 18.🧩 Saanvi bought 4 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹10 (c) ₹40 (d) ₹15
19. 19.🧩 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
20. 20.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
21. 21.🧩 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
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
24. 24.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 7 (c) not enough info (d) 14
25. 25.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
26. 26.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
27. 27.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
29. 29.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
30. 30.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
31. 31.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
32. 32.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
33. 33.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
34. 34.🧩 Tara bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹30 (c) not enough info (d) ₹15
35. 35.🧩 Kabir is 9 years old. Aarav is 2 years older than Kabir. How old is Aarav? (a) 12 (b) 2 (c) 11 (d) not enough info
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
37. 37.🧩 Meera is 7 years old. Tara is older than Meera. How old is Tara? (a) 8 (b) 9 (c) not enough info (d) 12
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
39. 39.🧩 Diya is 6 years old. Saanvi is 4 years older than Diya. How old is Saanvi? (a) 10 (b) 4 (c) not enough info (d) 11
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False

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