Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 440 · 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.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
2. 2.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) 20 (c) not enough info (d) 9
3. 3.🧩 Meera bought 6 pens and a lunch box for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) ₹264 (c) not enough info (d) ₹45
4. 4.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
5. 5.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
6. 6.🧩 Rohan is 10 years old. Tara is 8 years older than Rohan. How old is Tara? (a) not enough info (b) 8 (c) 18 (d) 19
7. 7.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
8. 8.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 7 PM
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
11. 11.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
13. 13.📊 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
14. 14.🧩 Saanvi bought 5 markers and a bag for ₹195 in all. Each marker cost the same. What did one marker cost? (a) ₹39 (b) not enough info (c) ₹190 (d) ₹195
15. 15.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
16. 16.🧩 A box has 7 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 15 (c) 64 (d) 56
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
18. 18.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
19. 19.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
20. 20.🧩 Vihaan bought 4 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹15 (c) ₹20 (d) not enough info
21. 21.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
22. 22.🧩 Ananya bought 6 kites and a lunch box for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹140 (b) not enough info (c) ₹134 (d) ₹23
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.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
25. 25.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
26. 26.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 15 (b) not enough info (c) 8 (d) 20
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.🧩 Ananya bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹35 (c) ₹180 (d) ₹30
29. 29.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 6 PM (d) 9 PM
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
31. 31.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Aarav bought 3 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) ₹75 (c) not enough info (d) ₹25
33. 33.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
34. 34.🧩 A box has 3 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 7 (c) 12 (d) 16
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
36. 36.🧩 A box has 4 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 20 (c) 25 (d) 9
37. 37.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) no mango is sweet (d) yes, mangoes match
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
39. 39.🧩 Arjun bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹60
40. 40.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True

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