Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 846 · 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.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
3. 3.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
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
5. 5.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) for fun only (d) to waste time
6. 6.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
7. 7.🧩 Ishaan bought 4 markers for ₹200 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹55 (c) ₹200 (d) ₹50
8. 8.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 14 (c) 70 (d) 7
9. 9.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
11. 11.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
12. 12.🧩 Vihaan bought 2 pens for ₹70 in all. Each pen cost the same. What did one pen cost? (a) ₹70 (b) ₹40 (c) not enough info (d) ₹35
13. 13.🧩 Diya is 8 years old. Aarav is 2 years older than Diya. How old is Aarav? (a) 2 (b) not enough info (c) 11 (d) 10
14. 14.🧩 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
15. 15.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
17. 17.🧩 Arjun is 10 years old. Kabir is 2 years older than Arjun. How old is Kabir? (a) 13 (b) 12 (c) not enough info (d) 2
18. 18.🧩 Ishaan is 9 years old. Diya is older than Ishaan. How old is Diya? (a) 11 (b) 10 (c) 14 (d) not enough info
19. 19.🧩 A box has 5 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 11 (c) 36 (d) 30
20. 20.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
22. 22.🧩 A box has 3 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 7 (b) not enough info (c) 12 (d) 16
23. 23.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not 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) False (b) True
25. 25.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
26. 26.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
27. 27.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
28. 28.🧩 Saanvi is 6 years old. Diya is older than Saanvi. How old is Diya? (a) not enough info (b) 7 (c) 8 (d) 11
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
34. 34.🧩 Rohan bought 6 mangoes and a water bottle for ₹260 in all. Each mango cost the same. What did one mango cost? (a) ₹254 (b) ₹260 (c) ₹43 (d) not enough info
35. 35.🧩 Saanvi bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) ₹30 (c) not enough info (d) ₹25
36. 36.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
37. 37.🧩 Ananya bought 3 mangoes and a bag for ₹145 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) ₹142 (c) ₹145 (d) not enough info
38. 38.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
40. 40.🧩 Saanvi bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹180

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