Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 511 · 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.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 4 PM
2. 2.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
4. 4.🧩 Vihaan is 7 years old. Arjun is 3 years older than Vihaan. How old is Arjun? (a) 3 (b) not enough info (c) 11 (d) 10
5. 5.🧩 A box has 5 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 25 (c) 10 (d) 30
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
7. 7.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
8. 8.🧩 Diya is 7 years old. Ananya is 2 years older than Diya. How old is Ananya? (a) not enough info (b) 10 (c) 9 (d) 2
9. 9.🧩 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
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Vihaan is 11 years old. Saanvi is 3 years older than Vihaan. How old is Saanvi? (a) not enough info (b) 15 (c) 3 (d) 14
12. 12.🧩 Saanvi bought 5 pens and a water bottle for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹90 (b) not enough info (c) ₹85 (d) ₹18
13. 13.📊 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
14. 14.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) not enough info (c) 12 (d) 60
15. 15.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
16. 16.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Arjun is 6 years old. Aarav is 2 years older than Arjun. How old is Aarav? (a) 9 (b) not enough info (c) 2 (d) 8
18. 18.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
19. 19.🧩 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
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
21. 21.🧩 Vihaan is 9 years old. Nisha is older than Vihaan. How old is Nisha? (a) 10 (b) 11 (c) not enough info (d) 14
22. 22.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
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.🧩 Ishaan bought 5 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹15 (c) ₹50 (d) not enough info
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
29. 29.🧩 A box has 4 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 40 (b) not enough info (c) 12 (d) 32
30. 30.🧩 Saanvi is 10 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 11 (b) 15 (c) 12 (d) not enough info
31. 31.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 4 PM (d) 8 PM
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
33. 33.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box has 4 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 24 (b) not enough info (c) 10 (d) 30
35. 35.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
36. 36.🧩 Saanvi bought 6 notebooks and a water bottle for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹360 (c) ₹60 (d) ₹354
37. 37.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 15 (b) 20 (c) not enough info (d) 8
38. 38.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
39. 39.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
40. 40.🧩 Tara bought 4 mangoes and a bag for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹37 (b) not enough info (c) ₹146 (d) ₹150

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