Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 185 · 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) a loud opinion (b) a guess (c) a rumour (d) facts that support it
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
3. 3.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
4. 4.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
5. 5.🧩 Vihaan is 12 years old. Kabir is 2 years older than Vihaan. How old is Kabir? (a) 2 (b) not enough info (c) 15 (d) 14
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
9. 9.🧩 Saanvi bought 5 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹100
10. 10.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) not enough info (d) 8 PM
11. 11.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
13. 13.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
14. 14.🧩 Vihaan is 12 years old. Tara is older than Vihaan. How old is Tara? (a) 14 (b) 17 (c) not enough info (d) 13
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
16. 16.🧩 Vihaan is 8 years old. Diya is older than Vihaan. How old is Diya? (a) 9 (b) 10 (c) 13 (d) not enough info
17. 17.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
18. 18.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) not enough info (b) 6 (c) 60 (d) 12
19. 19.🧩 Saanvi is 8 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) not enough info (b) 10 (c) 9 (d) 13
20. 20.🧩 Ananya bought 5 balls and a cap for ₹70 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹70 (c) not enough info (d) ₹14
21. 21.🧩 Rohan bought 3 mangoes and a bag for ₹85 in all. Each mango cost the same. What did one mango cost? (a) ₹82 (b) ₹28 (c) ₹85 (d) not enough info
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) not enough info (d) 9 PM
24. 24.🧩 Rohan bought 3 notebooks and a lunch box for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹40 (c) ₹120 (d) ₹117
25. 25.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 72 (b) 64 (c) not enough info (d) 16
26. 26.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
29. 29.🧩 Tara bought 6 kites and a lunch box for ₹360 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹360 (d) ₹354
30. 30.🧩 Arjun is 10 years old. Saanvi is 2 years older than Arjun. How old is Saanvi? (a) 13 (b) not enough info (c) 12 (d) 2
31. 31.🧩 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
32. 32.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
33. 33.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
34. 34.🧩 Ananya bought 5 mangoes for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹300 (b) ₹60 (c) ₹65 (d) not enough info
35. 35.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
36. 36.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
38. 38.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
39. 39.🧩 Nisha bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹50 (c) ₹200 (d) ₹55
40. 40.🧩 Ananya is 6 years old. Diya is 4 years older than Ananya. How old is Diya? (a) 10 (b) 11 (c) not enough info (d) 4

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