Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 520 · 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.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
2. 2.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
4. 4.🧩 Aarav bought 2 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹80 (c) ₹40 (d) not enough info
5. 5.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
7. 7.🧩 Meera bought 5 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹75
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
9. 9.🧩 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
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
12. 12.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 60 (d) 6
13. 13.🧩 Aarav bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹140 (b) not enough info (c) ₹35 (d) ₹40
14. 14.🧩 Aarav is 9 years old. Nisha is 4 years older than Aarav. How old is Nisha? (a) 14 (b) 4 (c) 13 (d) not enough info
15. 15.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
16. 16.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) not enough info (c) 6 PM (d) 5 PM
17. 17.🧩 Aarav bought 4 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹120 (b) ₹35 (c) not enough info (d) ₹30
18. 18.🧩 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
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
20. 20.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
21. 21.🧩 Vihaan bought 4 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹40 (c) not enough info (d) ₹15
22. 22.🧩 Rohan bought 5 kites for ₹175 in all. Each kite cost the same. What did one kite cost? (a) ₹175 (b) not enough info (c) ₹35 (d) ₹40
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
24. 24.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
25. 25.🧩 Rohan bought 3 balls and a bag for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹162 (b) ₹165 (c) not enough info (d) ₹55
26. 26.🧩 Meera is 6 years old. Tara is 7 years older than Meera. How old is Tara? (a) not enough info (b) 7 (c) 14 (d) 13
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
28. 28.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) never see dogs (d) all dogs are mean
30. 30.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
31. 31.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 48 (b) 56 (c) 14 (d) not enough info
32. 32.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
33. 33.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
34. 34.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) not enough info (d) 7 PM
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Diya bought 5 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) ₹75 (b) ₹15 (c) not enough info (d) ₹20
40. 40.🧩 Meera bought 6 markers and a water bottle for ₹210 in all. Each marker cost the same. What did one marker cost? (a) ₹210 (b) not enough info (c) ₹204 (d) ₹35

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