Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 641 · 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 of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) 40 (c) 4 (d) not enough info
2. 2.🧩 Tara bought 6 mangoes and a lunch box for ₹260 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹254 (c) ₹43 (d) ₹260
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
4. 4.🧩 Arjun bought 5 notebooks and a cap for ₹265 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹53 (c) ₹265 (d) ₹260
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Aarav is 7 years old. Vihaan is older than Aarav. How old is Vihaan? (a) 8 (b) 12 (c) 9 (d) not enough info
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Arjun bought 2 kites for ₹20 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹20
10. 10.🧩 Vihaan is 6 years old. Meera is 9 years older than Vihaan. How old is Meera? (a) 16 (b) 9 (c) not enough info (d) 15
11. 11.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
12. 12.🧩 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
13. 13.🧩 Ananya bought 5 mangoes and a bag for ₹190 in all. Each mango cost the same. What did one mango cost? (a) ₹38 (b) not enough info (c) ₹185 (d) ₹190
14. 14.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
15. 15.🧩 A box has 6 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 12 (b) 36 (c) 42 (d) not enough info
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
17. 17.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
18. 18.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 30 (b) 24 (c) 10 (d) not enough info
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
20. 20.🧩 Ananya bought 2 notebooks and a water bottle for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹130 (b) ₹128 (c) ₹65 (d) not enough info
21. 21.🧩 Saanvi is 10 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 11 (b) 12 (c) not enough info (d) 15
22. 22.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
23. 23.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
24. 24.🧩 Nisha bought 4 mangoes and a lunch box for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) ₹25 (c) not enough info (d) ₹96
25. 25.🧩 Kabir bought 4 balls and a bag for ₹160 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹160 (c) not enough info (d) ₹156
26. 26.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 14 (b) 48 (c) not enough info (d) 56
27. 27.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
28. 28.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
30. 30.🧩 Aarav bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹45 (c) not enough info (d) ₹50
31. 31.🧩 Rohan bought 5 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) not enough info (c) ₹40 (d) ₹45
32. 32.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
33. 33.🧩 A box has 4 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 32 (b) 40 (c) not enough info (d) 12
34. 34.🧩 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
35. 35.🧩 A box has 6 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 49 (b) not enough info (c) 13 (d) 42
36. 36.🧩 Kabir bought 5 kites and a water bottle for ₹240 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹240 (c) ₹235 (d) ₹48
37. 37.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
39. 39.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) 2 PM (d) not enough info
40. 40.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting

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