Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 151 · 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.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 12 (b) not enough info (c) 40 (d) 32
2. 2.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
3. 3.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
4. 4.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
5. 5.🧩 A box has 3 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 7 (d) 12
6. 6.🧩 Diya bought 2 kites and a water bottle for ₹70 in all. Each kite cost the same. What did one kite cost? (a) ₹68 (b) ₹35 (c) not enough info (d) ₹70
7. 7.🧩 Ishaan is 6 years old. Rohan is 3 years older than Ishaan. How old is Rohan? (a) not enough info (b) 9 (c) 10 (d) 3
8. 8.🧩 Ishaan is 12 years old. Aarav is 9 years older than Ishaan. How old is Aarav? (a) not enough info (b) 9 (c) 22 (d) 21
9. 9.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
10. 10.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
11. 11.🧩 Meera bought 4 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹80
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Kabir is 10 years old. Diya is 7 years older than Kabir. How old is Diya? (a) not enough info (b) 18 (c) 7 (d) 17
15. 15.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
17. 17.🧩 Nisha bought 3 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹150 (b) ₹50 (c) ₹55 (d) not enough info
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Aarav bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹80
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
21. 21.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
22. 22.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 20 (b) 25 (c) 9 (d) not enough info
23. 23.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
24. 24.🧩 Kabir is 10 years old. Rohan is 2 years older than Kabir. How old is Rohan? (a) not enough info (b) 2 (c) 12 (d) 13
25. 25.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
26. 26.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
28. 28.🧩 Meera is 7 years old. Arjun is 9 years older than Meera. How old is Arjun? (a) 9 (b) 16 (c) 17 (d) not enough info
29. 29.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 8 PM (d) 7 PM
30. 30.🧩 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
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
32. 32.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
33. 33.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
34. 34.🧩 Kabir bought 3 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹10 (b) ₹30 (c) ₹15 (d) not enough info
35. 35.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 72 (c) 17 (d) 81
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
37. 37.🧩 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
38. 38.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Diya bought 2 mangoes for ₹40 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) not enough info (c) ₹25 (d) ₹20
40. 40.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False

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