Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 499 · 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) for fun only (c) to be sure of results (d) to waste time
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
6. 6.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
8. 8.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 16 (b) not enough info (c) 8 (d) 20
9. 9.🧩 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
10. 10.🧩 Aarav is 11 years old. Meera is 6 years older than Aarav. How old is Meera? (a) not enough info (b) 6 (c) 17 (d) 18
11. 11.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
12. 12.🧩 Meera is 12 years old. Ishaan is 2 years older than Meera. How old is Ishaan? (a) 15 (b) 2 (c) not enough info (d) 14
13. 13.🧩 Aarav bought 3 pens and a lunch box for ₹125 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹125 (c) ₹122 (d) ₹41
14. 14.🧩 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
15. 15.🧩 Vihaan is 6 years old. Kabir is older than Vihaan. How old is Kabir? (a) 8 (b) not enough info (c) 7 (d) 11
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
19. 19.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
20. 20.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
21. 21.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) 2 PM (d) not enough info
22. 22.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
23. 23.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
24. 24.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
25. 25.🧩 Kabir bought 6 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹25 (c) ₹150 (d) not enough info
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Aarav bought 3 notebooks and a lunch box for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) not enough info (c) ₹75 (d) ₹72
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
30. 30.🥭 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) no mango is sweet (c) no, check more (d) yes, it is certain
31. 31.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
32. 32.🧩 A box has 3 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 21 (b) 28 (c) not enough info (d) 10
33. 33.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 9 PM
34. 34.🧩 A box has 6 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 63 (b) 54 (c) not enough info (d) 15
35. 35.🧩 Kabir bought 4 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹80
36. 36.🧩 Kabir bought 2 pens and a water bottle for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹98 (c) not enough info (d) ₹100
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
38. 38.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 36 (b) 13 (c) not enough info (d) 45
39. 39.🧩 Ananya bought 4 pens for ₹220 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹220 (c) ₹55 (d) not enough info
40. 40.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean

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