Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 131 · 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 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
3. 3.🧩 Ishaan is 7 years old. Rohan is 9 years older than Ishaan. How old is Rohan? (a) 17 (b) 16 (c) 9 (d) not enough info
4. 4.🧩 A box has 4 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 40 (b) 12 (c) not enough info (d) 32
5. 5.🧩 Rohan is 10 years old. Ananya is 4 years older than Rohan. How old is Ananya? (a) 15 (b) not enough info (c) 14 (d) 4
6. 6.🧩 Ananya bought 4 markers and a lunch box for ₹270 in all. Each marker cost the same. What did one marker cost? (a) ₹67 (b) ₹270 (c) ₹266 (d) not enough info
7. 7.🧩 Vihaan bought 3 markers and a water bottle for ₹155 in all. Each marker cost the same. What did one marker cost? (a) ₹51 (b) ₹155 (c) not enough info (d) ₹152
8. 8.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 15 (d) 20
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
11. 11.🧩 Diya is 10 years old. Kabir is 7 years older than Diya. How old is Kabir? (a) 7 (b) 18 (c) not enough info (d) 17
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 6 PM
14. 14.🧩 A box has 6 rows of apples, with 8 in each row. How many apples are in the box? (a) 14 (b) 48 (c) 56 (d) not enough info
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
17. 17.🧩 Ishaan bought 6 notebooks for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹270 (d) ₹45
18. 18.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
19. 19.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) not enough info (b) 18 (c) 90 (d) 9
20. 20.🥭 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 mango is sweet (c) yes, it is certain (d) no, check more
21. 21.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
22. 22.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 7 PM (c) 8 PM (d) not enough info
23. 23.🧩 Tara bought 5 balls for ₹125 in all. Each ball cost the same. What did one ball cost? (a) ₹125 (b) ₹30 (c) not enough info (d) ₹25
24. 24.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
25. 25.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 64 (b) 16 (c) not enough info (d) 72
26. 26.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) the page number (d) what facts are given
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.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
32. 32.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) not enough info (b) 14 (c) 7 (d) 70
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Diya is 10 years old. Aarav is 5 years older than Diya. How old is Aarav? (a) 15 (b) 16 (c) 5 (d) not enough info
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Diya bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹120
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
38. 38.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
39. 39.🧩 Kabir is 9 years old. Aarav is older than Kabir. How old is Aarav? (a) 11 (b) 10 (c) not enough info (d) 14
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False

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