Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 710 · 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.🐕 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
2. 2.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
3. 3.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
4. 4.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 2 PM
5. 5.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 25 (b) not enough info (c) 30 (d) 10
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
7. 7.🧩 Diya bought 3 markers and a cap for ₹105 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹105 (c) not enough info (d) ₹102
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
9. 9.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
11. 11.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
13. 13.🥭 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 mango is sweet (c) no, check more (d) yes, mangoes match
14. 14.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 70 (b) not enough info (c) 7 (d) 14
15. 15.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
17. 17.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
18. 18.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
19. 19.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) 6 PM (d) not enough info
20. 20.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
21. 21.🧩 Vihaan bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹275 (b) ₹55 (c) ₹60 (d) not enough info
22. 22.🧩 A box has 5 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 24 (c) 9 (d) 20
23. 23.🧩 Kabir bought 4 pens and a water bottle for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹146 (b) ₹150 (c) not enough info (d) ₹37
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
25. 25.🧩 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
26. 26.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 2 PM
27. 27.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
28. 28.🧩 Ishaan bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹55 (c) ₹300 (d) ₹50
29. 29.🧩 Aarav bought 3 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹60 (c) ₹180 (d) ₹65
30. 30.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
31. 31.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
32. 32.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 6 PM
33. 33.🧩 Ishaan bought 4 kites and a bag for ₹320 in all. Each kite cost the same. What did one kite cost? (a) ₹316 (b) not enough info (c) ₹320 (d) ₹80
34. 34.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
35. 35.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 28 (d) 24
36. 36.🧩 A box has 4 rows of apples, with 8 in each row. How many apples are in the box? (a) 32 (b) not enough info (c) 12 (d) 40
37. 37.🧩 Rohan bought 6 markers for ₹360 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹360
38. 38.🧩 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
39. 39.🧩 Kabir is 7 years old. Vihaan is older than Kabir. How old is Vihaan? (a) not enough info (b) 9 (c) 12 (d) 8
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence

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