Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 246 · 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 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 2 PM
2. 2.🧩 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
3. 3.🥭 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, check more (d) no mango is sweet
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
5. 5.🐕 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
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
7. 7.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 10 (b) 28 (c) 21 (d) not enough info
8. 8.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
12. 12.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
13. 13.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
14. 14.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
15. 15.🧩 Aarav is 8 years old. Nisha is 7 years older than Aarav. How old is Nisha? (a) not enough info (b) 16 (c) 15 (d) 7
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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
18. 18.🧩 Rohan is 7 years old. Arjun is older than Rohan. How old is Arjun? (a) 8 (b) 9 (c) not enough info (d) 12
19. 19.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
20. 20.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
21. 21.🧩 A box has 6 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 28 (d) 24
22. 22.🧩 Kabir is 8 years old. Ishaan is older than Kabir. How old is Ishaan? (a) not enough info (b) 13 (c) 10 (d) 9
23. 23.🧩 Aarav bought 5 kites and a water bottle for ₹340 in all. Each kite cost the same. What did one kite cost? (a) ₹340 (b) ₹335 (c) not enough info (d) ₹68
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
25. 25.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
26. 26.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
27. 27.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
28. 28.🧩 A box has 3 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 24 (b) 18 (c) not enough info (d) 9
29. 29.🧩 Vihaan is 8 years old. Arjun is older than Vihaan. How old is Arjun? (a) not enough info (b) 10 (c) 9 (d) 13
30. 30.🧩 Nisha is 12 years old. Tara is 2 years older than Nisha. How old is Tara? (a) 2 (b) 14 (c) not enough info (d) 15
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
33. 33.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
34. 34.🧩 A box has 4 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 25 (b) not enough info (c) 20 (d) 9
35. 35.🧩 Aarav bought 4 pens for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) not enough info (c) ₹160 (d) ₹40
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
38. 38.🧩 Diya is 6 years old. Meera is older than Diya. How old is Meera? (a) 8 (b) 7 (c) not enough info (d) 11
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True

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