Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 523 · 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.🧩 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
2. 2.🥭 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
3. 3.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
4. 4.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
7. 7.🐕 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
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Ananya bought 6 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹15 (d) ₹10
13. 13.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
14. 14.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 4 PM
15. 15.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
16. 16.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
17. 17.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
18. 18.🧩 A box has 7 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 64 (b) not enough info (c) 15 (d) 56
19. 19.🧩 Meera bought 2 pens for ₹20 in all. Each pen cost the same. What did one pen cost? (a) ₹10 (b) ₹15 (c) ₹20 (d) not enough info
20. 20.🧩 Diya is 12 years old. Meera is older than Diya. How old is Meera? (a) not enough info (b) 17 (c) 14 (d) 13
21. 21.🧩 A box has 7 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 56 (d) 49
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
23. 23.🧩 Saanvi bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹35 (c) not enough info (d) ₹70
24. 24.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
25. 25.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
26. 26.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Arjun bought 2 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹25 (d) ₹40
28. 28.🧩 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
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
31. 31.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
32. 32.🧩 Diya bought 3 notebooks and a lunch box for ₹65 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹62 (c) ₹21 (d) not enough info
33. 33.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 6 PM
34. 34.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 6 PM
35. 35.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
36. 36.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
37. 37.🧩 Ishaan bought 3 kites and a water bottle for ₹155 in all. Each kite cost the same. What did one kite cost? (a) ₹155 (b) ₹51 (c) not enough info (d) ₹152
38. 38.🧩 Kabir is 6 years old. Diya is older than Kabir. How old is Diya? (a) 11 (b) not enough info (c) 7 (d) 8
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
40. 40.🧩 Kabir is 9 years old. Aarav is 5 years older than Kabir. How old is Aarav? (a) 5 (b) 14 (c) 15 (d) not enough info

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