Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 994 · 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.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Kabir bought 2 mangoes for ₹50 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹50 (c) ₹30 (d) ₹25
4. 4.🧩 Aarav is 10 years old. Ananya is 5 years older than Aarav. How old is Ananya? (a) 5 (b) not enough info (c) 16 (d) 15
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
6. 6.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
10. 10.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 6 (b) 12 (c) 60 (d) not enough info
11. 11.🧩 Vihaan bought 6 mangoes and a water bottle for ₹370 in all. Each mango cost the same. What did one mango cost? (a) ₹364 (b) ₹370 (c) ₹61 (d) not enough info
12. 12.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
13. 13.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
14. 14.🧩 Kabir is 7 years old. Vihaan is older than Kabir. How old is Vihaan? (a) not enough info (b) 8 (c) 9 (d) 12
15. 15.📊 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
16. 16.🧩 Arjun is 11 years old. Meera is older than Arjun. How old is Meera? (a) 16 (b) 12 (c) not enough info (d) 13
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
18. 18.🧩 Tara bought 4 kites for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) not enough info (c) ₹220 (d) ₹60
19. 19.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
21. 21.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
22. 22.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 7 PM (c) 4 PM (d) not enough info
23. 23.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
24. 24.🧩 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
25. 25.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
26. 26.🧩 Kabir bought 2 kites and a water bottle for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) not enough info (c) ₹138 (d) ₹140
27. 27.🧩 Meera is 11 years old. Kabir is 5 years older than Meera. How old is Kabir? (a) 5 (b) not enough info (c) 16 (d) 17
28. 28.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 2 PM (d) 4 PM
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, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
30. 30.🧩 Nisha bought 5 pens and a bag for ₹320 in all. Each pen cost the same. What did one pen cost? (a) ₹64 (b) not enough info (c) ₹320 (d) ₹315
31. 31.🧩 Diya is 6 years old. Arjun is 4 years older than Diya. How old is Arjun? (a) 11 (b) not enough info (c) 4 (d) 10
32. 32.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
33. 33.🧩 Rohan bought 5 pens for ₹250 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹250 (c) ₹50 (d) ₹55
34. 34.🧩 Kabir is 10 years old. Ishaan is older than Kabir. How old is Ishaan? (a) 12 (b) not enough info (c) 11 (d) 15
35. 35.🧩 Nisha is 8 years old. Tara is older than Nisha. How old is Tara? (a) 13 (b) 10 (c) not enough info (d) 9
36. 36.🧩 A box has 6 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 63 (b) 15 (c) 54 (d) not enough info
37. 37.🧩 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
38. 38.🧩 Ishaan bought 5 balls and a cap for ₹330 in all. Each ball cost the same. What did one ball cost? (a) ₹66 (b) ₹330 (c) ₹325 (d) not enough info
39. 39.🧩 A box has 4 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 45 (b) 36 (c) not enough info (d) 13
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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