Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 881 · 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 oranges, with 7 in each row. How many oranges are in the box? (a) 10 (b) 21 (c) 28 (d) not enough info
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🧩 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
4. 4.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
7. 7.🧩 Vihaan bought 5 notebooks and a lunch box for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) ₹220 (b) ₹225 (c) not enough info (d) ₹45
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
9. 9.🧩 Ananya bought 2 notebooks and a lunch box for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹160 (b) not enough info (c) ₹158 (d) ₹80
10. 10.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) not enough info (b) 18 (c) 9 (d) 90
18. 18.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 6 (c) 60 (d) 12
19. 19.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
20. 20.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info
21. 21.🧩 Tara bought 3 balls and a water bottle for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹46 (b) not enough info (c) ₹137 (d) ₹140
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
23. 23.🧩 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
24. 24.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 6 PM
25. 25.🧩 Ishaan is 11 years old. Aarav is older than Ishaan. How old is Aarav? (a) not enough info (b) 13 (c) 16 (d) 12
26. 26.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
27. 27.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
30. 30.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
31. 31.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
32. 32.🧩 A box has 8 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 72 (c) 64 (d) 16
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 16 (b) 8 (c) 20 (d) not enough info
35. 35.🧩 Nisha bought 5 mangoes for ₹225 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) not enough info (c) ₹225 (d) ₹45
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Rohan bought 4 notebooks and a bag for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹160 (c) not enough info (d) ₹156
38. 38.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) 5 PM (d) not enough info
39. 39.🧩 Tara bought 6 mangoes for ₹270 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹45 (c) ₹270 (d) ₹50
40. 40.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info

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