Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 949 · 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.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
2. 2.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
3. 3.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) not enough info (b) 40 (c) 4 (d) 8
4. 4.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 4 PM
5. 5.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
6. 6.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
8. 8.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 6 PM
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
10. 10.🧩 Tara bought 6 markers and a bag for ₹370 in all. Each marker cost the same. What did one marker cost? (a) ₹370 (b) ₹364 (c) not enough info (d) ₹61
11. 11.🧩 Ananya bought 2 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹40 (c) not enough info (d) ₹80
12. 12.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
13. 13.🧩 Aarav is 10 years old. Diya is 8 years older than Aarav. How old is Diya? (a) not enough info (b) 19 (c) 8 (d) 18
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Ananya bought 3 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹120 (d) ₹40
16. 16.🧩 Tara bought 2 kites and a lunch box for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹118 (c) ₹120 (d) not enough info
17. 17.🧩 Tara is 6 years old. Meera is 7 years older than Tara. How old is Meera? (a) 14 (b) 7 (c) 13 (d) not enough info
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 2 PM (d) not enough info
19. 19.🧩 A box has 8 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 72 (b) 81 (c) not enough info (d) 17
20. 20.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 9 (c) not enough info (d) 18
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
22. 22.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
23. 23.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
24. 24.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 45 (c) 13 (d) 40
25. 25.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) not enough info (c) 10 PM (d) 6 PM
26. 26.🧩 A box has 3 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 24 (b) not enough info (c) 32 (d) 11
27. 27.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
28. 28.🧩 Kabir is 12 years old. Vihaan is 4 years older than Kabir. How old is Vihaan? (a) 17 (b) 4 (c) 16 (d) not enough info
29. 29.🧩 Saanvi bought 4 kites and a bag for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹206 (b) not enough info (c) ₹210 (d) ₹52
30. 30.🧩 Ishaan is 7 years old. Kabir is older than Ishaan. How old is Kabir? (a) not enough info (b) 12 (c) 9 (d) 8
31. 31.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 54 (c) 48 (d) 14
32. 32.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
33. 33.🧩 Rohan bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹180
34. 34.🧩 Nisha is 7 years old. Aarav is 2 years older than Nisha. How old is Aarav? (a) not enough info (b) 2 (c) 10 (d) 9
35. 35.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
37. 37.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
38. 38.🧩 A box has 6 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 11 (b) 35 (c) 30 (d) not enough info
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence

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