Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 694 · 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) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
5. 5.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
7. 7.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 9 PM
8. 8.🧩 Aarav bought 3 pens and a lunch box for ₹85 in all. Each pen cost the same. What did one pen cost? (a) ₹28 (b) ₹85 (c) ₹82 (d) not enough info
9. 9.🧩 Ishaan is 11 years old. Diya is older than Ishaan. How old is Diya? (a) 12 (b) not enough info (c) 16 (d) 13
10. 10.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
12. 12.🧩 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
13. 13.🧩 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
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
15. 15.🧩 Vihaan is 10 years old. Rohan is older than Vihaan. How old is Rohan? (a) 12 (b) 11 (c) 15 (d) not enough info
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
19. 19.🧩 Ananya is 7 years old. Rohan is older than Ananya. How old is Rohan? (a) 12 (b) 9 (c) not enough info (d) 8
20. 20.🧩 A box has 3 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 7 (d) 16
21. 21.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
23. 23.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 3 PM (c) not enough info (d) 6 PM
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Vihaan bought 5 mangoes and a water bottle for ₹210 in all. Each mango cost the same. What did one mango cost? (a) ₹205 (b) ₹210 (c) ₹42 (d) not enough info
26. 26.🧩 A box has 3 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 32 (c) 11 (d) 24
27. 27.🧩 Rohan bought 4 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹120
28. 28.🧩 Tara is 6 years old. Meera is 9 years older than Tara. How old is Meera? (a) 16 (b) 9 (c) not enough info (d) 15
29. 29.🧩 Tara bought 6 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹150 (c) ₹25 (d) not enough info
30. 30.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
31. 31.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
32. 32.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
33. 33.🧩 Arjun is 8 years old. Kabir is 4 years older than Arjun. How old is Kabir? (a) not enough info (b) 4 (c) 13 (d) 12
34. 34.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
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Tara is 11 years old. Nisha is older than Tara. How old is Nisha? (a) not enough info (b) 12 (c) 16 (d) 13
38. 38.🧩 Diya bought 4 kites and a water bottle for ₹160 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) ₹160 (c) ₹156 (d) not enough info
39. 39.🧩 Tara bought 4 balls and a cap for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹116 (b) ₹120 (c) not enough info (d) ₹30
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False

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