Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 537 · 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.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
3. 3.🧩 Kabir bought 2 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) ₹50 (c) not enough info (d) ₹45
4. 4.🥭 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, check more (c) no mango is sweet (d) yes, it is certain
5. 5.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 9 PM
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box has 6 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 49 (c) 13 (d) 42
8. 8.📊 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
9. 9.🧩 Ananya bought 6 kites and a cap for ₹310 in all. Each kite cost the same. What did one kite cost? (a) ₹310 (b) ₹51 (c) ₹304 (d) not enough info
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Kabir is 10 years old. Ananya is older than Kabir. How old is Ananya? (a) 15 (b) not enough info (c) 12 (d) 11
12. 12.🧩 Ishaan is 7 years old. Kabir is 3 years older than Ishaan. How old is Kabir? (a) not enough info (b) 11 (c) 10 (d) 3
13. 13.🧩 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
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Aarav bought 5 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) not enough info (c) ₹50 (d) ₹10
17. 17.🧩 Tara bought 2 kites and a cap for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹90 (c) ₹88 (d) not enough info
18. 18.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
19. 19.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
20. 20.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
21. 21.🧩 Ishaan bought 5 notebooks and a lunch box for ₹190 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹38 (c) ₹185 (d) ₹190
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.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
24. 24.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Nisha is 11 years old. Meera is older than Nisha. How old is Meera? (a) 16 (b) not enough info (c) 12 (d) 13
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
28. 28.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Meera bought 5 balls and a bag for ₹280 in all. Each ball cost the same. What did one ball cost? (a) ₹280 (b) ₹275 (c) not enough info (d) ₹56
31. 31.🧩 Aarav bought 2 pens and a cap for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹38 (c) not enough info (d) ₹40
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
34. 34.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 5 PM (c) 8 PM (d) not enough info
35. 35.🧩 Ananya bought 5 kites and a cap for ₹155 in all. Each kite cost the same. What did one kite cost? (a) ₹150 (b) ₹155 (c) not enough info (d) ₹31
36. 36.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
37. 37.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
38. 38.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 3 PM
39. 39.🧩 A box has 3 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 28 (b) 21 (c) 10 (d) not enough info
40. 40.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean

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