Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 10 · 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.🥭 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, check more (c) yes, it is certain (d) no mango is sweet
2. 2.🧩 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
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
6. 6.🧩 Rohan is 6 years old. Tara is older than Rohan. How old is Tara? (a) not enough info (b) 8 (c) 11 (d) 7
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
9. 9.🧩 Arjun is 9 years old. Ananya is 6 years older than Arjun. How old is Ananya? (a) not enough info (b) 16 (c) 15 (d) 6
10. 10.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
11. 11.🧩 Rohan is 9 years old. Ananya is 8 years older than Rohan. How old is Ananya? (a) 18 (b) not enough info (c) 8 (d) 17
12. 12.🧩 Diya bought 6 kites and a lunch box for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹244 (b) ₹41 (c) ₹250 (d) not enough info
13. 13.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 3 PM
14. 14.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) 5 PM (d) not enough info
15. 15.🧩 Saanvi bought 4 balls and a cap for ₹230 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹57 (c) ₹230 (d) ₹226
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
17. 17.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 5 PM
18. 18.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
19. 19.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
20. 20.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) for fun only (d) to be sure of results
21. 21.🧩 Nisha is 7 years old. Kabir is 3 years older than Nisha. How old is Kabir? (a) not enough info (b) 10 (c) 11 (d) 3
22. 22.🧩 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
23. 23.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
24. 24.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 9 PM
25. 25.🧩 A box has 5 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 45 (c) 54 (d) 14
26. 26.🧩 Vihaan is 12 years old. Aarav is 6 years older than Vihaan. How old is Aarav? (a) 6 (b) 18 (c) 19 (d) not enough info
27. 27.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 10 PM (d) 9 PM
28. 28.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 5 PM
29. 29.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
30. 30.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
31. 31.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 7 PM
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Diya bought 4 kites and a cap for ₹190 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹47 (c) ₹190 (d) ₹186
34. 34.🧩 Tara is 9 years old. Aarav is 5 years older than Tara. How old is Aarav? (a) not enough info (b) 5 (c) 15 (d) 14
35. 35.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
36. 36.🧩 Nisha is 10 years old. Vihaan is 4 years older than Nisha. How old is Vihaan? (a) 4 (b) not enough info (c) 15 (d) 14
37. 37.🧩 Kabir bought 3 mangoes for ₹165 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) not enough info (c) ₹60 (d) ₹165
38. 38.🧩 Rohan bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹25 (c) ₹20 (d) not enough info
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
40. 40.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

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