Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 735 · 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.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
4. 4.🧩 Rohan bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹120
5. 5.🧩 Nisha bought 4 markers and a water bottle for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹67 (b) ₹270 (c) not enough info (d) ₹266
6. 6.🧩 Rohan bought 5 kites and a water bottle for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹18 (b) ₹85 (c) ₹90 (d) not enough info
7. 7.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
8. 8.🧩 Tara is 11 years old. Nisha is 3 years older than Tara. How old is Nisha? (a) 3 (b) not enough info (c) 14 (d) 15
9. 9.🧩 A box has 6 rows of eggs, with 6 in each row. How many eggs are in the box? (a) not enough info (b) 42 (c) 12 (d) 36
10. 10.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Kabir bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹65 (c) ₹60 (d) ₹120
14. 14.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
15. 15.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
17. 17.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
18. 18.🧩 Meera bought 4 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹60 (c) not enough info (d) ₹15
19. 19.🧩 Aarav bought 3 pens for ₹165 in all. Each pen cost the same. What did one pen cost? (a) ₹165 (b) ₹60 (c) not enough info (d) ₹55
20. 20.🧩 Saanvi bought 4 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹80
21. 21.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Nisha is 9 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 14 (b) not enough info (c) 11 (d) 10
24. 24.🧩 Arjun is 10 years old. Ananya is 3 years older than Arjun. How old is Ananya? (a) not enough info (b) 3 (c) 13 (d) 14
25. 25.🧩 Aarav is 7 years old. Meera is 3 years older than Aarav. How old is Meera? (a) not enough info (b) 10 (c) 11 (d) 3
26. 26.🧩 Ishaan bought 3 kites and a cap for ₹145 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹48 (c) ₹142 (d) ₹145
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
29. 29.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
30. 30.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 6 PM (d) not enough info
31. 31.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
33. 33.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Aarav is 6 years old. Tara is 9 years older than Aarav. How old is Tara? (a) not enough info (b) 9 (c) 15 (d) 16
35. 35.🧩 Ishaan bought 3 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) not enough info (c) ₹35 (d) ₹30
36. 36.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 5 PM
37. 37.🧩 Tara bought 4 markers and a cap for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹216 (c) not enough info (d) ₹220
38. 38.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
39. 39.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
40. 40.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

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