Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 781 · 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.🧩 Rohan bought 5 balls and a cap for ₹280 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹275 (c) ₹56 (d) ₹280
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Ishaan bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹120 (c) ₹65 (d) ₹60
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
6. 6.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
7. 7.🧩 Tara bought 2 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹60 (c) ₹35 (d) ₹30
8. 8.🧩 Vihaan bought 5 markers and a cap for ₹295 in all. Each marker cost the same. What did one marker cost? (a) ₹290 (b) not enough info (c) ₹295 (d) ₹59
9. 9.🧩 A box has 5 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 30 (c) 25 (d) 10
10. 10.🧩 Kabir is 8 years old. Saanvi is older than Kabir. How old is Saanvi? (a) 13 (b) 9 (c) not enough info (d) 10
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
12. 12.🧩 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
13. 13.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 9 PM (d) 10 PM
14. 14.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
15. 15.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
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
17. 17.🧩 A box has 4 rows of apples, with 7 in each row. How many apples are in the box? (a) 28 (b) not enough info (c) 11 (d) 35
18. 18.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
19. 19.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 6 (b) 60 (c) not enough info (d) 12
20. 20.🧩 Meera bought 5 markers and a bag for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹44 (b) ₹215 (c) ₹220 (d) not enough info
21. 21.🧩 Ishaan bought 5 balls for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹250 (b) not enough info (c) ₹50 (d) ₹55
22. 22.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
23. 23.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
25. 25.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
26. 26.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
27. 27.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
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
29. 29.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
30. 30.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
31. 31.🧩 A box has 5 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 54 (b) 14 (c) 45 (d) not enough info
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
34. 34.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
35. 35.🧩 Diya is 6 years old. Rohan is 3 years older than Diya. How old is Rohan? (a) 10 (b) not enough info (c) 3 (d) 9
36. 36.🧩 Ishaan bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹100 (d) ₹30
37. 37.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 24 (c) 30 (d) 10
38. 38.🧩 Diya is 8 years old. Tara is older than Diya. How old is Tara? (a) 10 (b) 9 (c) 13 (d) not enough info
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
40. 40.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 4 PM

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