Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 256 · 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? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
2. 2.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
3. 3.🥭 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) no, check more (c) yes, mangoes match (d) yes, it is certain
4. 4.🧩 Diya is 12 years old. Vihaan is older than Diya. How old is Vihaan? (a) 13 (b) not enough info (c) 14 (d) 17
5. 5.🧩 Arjun bought 3 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹60
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
7. 7.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
8. 8.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
9. 9.🐕 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
10. 10.🧩 Vihaan is 10 years old. Rohan is older than Vihaan. How old is Rohan? (a) 15 (b) 11 (c) not enough info (d) 12
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
12. 12.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 4 (d) 8
13. 13.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 9 PM
14. 14.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 14 (b) 56 (c) not enough info (d) 48
15. 15.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 16 (b) 80 (c) 8 (d) not enough info
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
17. 17.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 2 PM (d) 6 PM
18. 18.🧩 Vihaan bought 4 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹100 (c) ₹25 (d) ₹30
19. 19.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
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
21. 21.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
22. 22.🧩 Vihaan bought 3 balls and a cap for ₹260 in all. Each ball cost the same. What did one ball cost? (a) ₹257 (b) ₹260 (c) not enough info (d) ₹86
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
24. 24.🧩 Aarav bought 3 pens and a lunch box for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹140 (b) ₹46 (c) not enough info (d) ₹137
25. 25.🧩 Vihaan bought 2 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) not enough info (c) ₹15 (d) ₹20
26. 26.🧩 Aarav bought 2 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹25 (d) ₹30
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
28. 28.🧩 Rohan is 11 years old. Diya is older than Rohan. How old is Diya? (a) 16 (b) 12 (c) 13 (d) not enough info
29. 29.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
30. 30.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 2 PM (c) not enough info (d) 4 PM
31. 31.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
32. 32.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
37. 37.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
38. 38.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True

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