Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 73 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
3. 3.🧩 Nisha is 9 years old. Vihaan is 2 years older than Nisha. How old is Vihaan? (a) not enough info (b) 11 (c) 2 (d) 12
4. 4.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 2 PM (c) 5 PM (d) not enough info
5. 5.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 7 PM
6. 6.🧩 Tara bought 3 balls and a cap for ₹145 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹142 (c) ₹48 (d) ₹145
7. 7.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
8. 8.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
9. 9.🧩 Ananya bought 5 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹100
10. 10.🧩 A box has 7 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 12 (b) 40 (c) not enough info (d) 35
11. 11.🧩 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
12. 12.🧩 Saanvi bought 4 balls for ₹140 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹140 (c) ₹35 (d) ₹40
13. 13.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Arjun bought 4 mangoes for ₹200 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) ₹50 (c) ₹200 (d) not enough info
15. 15.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) not enough info (b) 11 (c) 28 (d) 32
16. 16.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
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
18. 18.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) 8 PM (d) not enough info
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) 60 (c) not enough info (d) 12
22. 22.🧩 Arjun is 8 years old. Saanvi is 2 years older than Arjun. How old is Saanvi? (a) not enough info (b) 2 (c) 10 (d) 11
23. 23.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
24. 24.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Ishaan bought 4 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) not enough info (c) ₹15 (d) ₹20
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
27. 27.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
32. 32.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
33. 33.🧩 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
34. 34.🧩 A box has 8 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 12 (b) 32 (c) not enough info (d) 36
35. 35.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
36. 36.🧩 Meera bought 3 kites and a bag for ₹155 in all. Each kite cost the same. What did one kite cost? (a) ₹152 (b) not enough info (c) ₹51 (d) ₹155
37. 37.🧩 Ishaan is 9 years old. Kabir is 4 years older than Ishaan. How old is Kabir? (a) 14 (b) 4 (c) not enough info (d) 13
38. 38.🧩 Ishaan is 8 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 13 (b) not enough info (c) 10 (d) 9
39. 39.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
40. 40.🧩 Aarav is 6 years old. Ananya is older than Aarav. How old is Ananya? (a) 7 (b) 8 (c) not enough info (d) 11

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