Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 11 · 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 mango is sweet (c) no, check more (d) yes, it is certain
2. 2.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Arjun bought 5 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹150
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
5. 5.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
6. 6.🧩 Meera bought 6 balls and a cap for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) not enough info (c) ₹144 (d) ₹25
7. 7.🧩 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
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) all dogs are mean (d) dogs hate you
9. 9.🧩 Tara bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) not enough info (c) ₹65 (d) ₹120
10. 10.🧩 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
11. 11.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Aarav bought 6 kites and a cap for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹220 (b) ₹36 (c) ₹214 (d) not enough info
14. 14.🧩 Kabir bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹120 (d) ₹25
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
20. 20.🧩 Aarav is 7 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 8 (b) 12 (c) 9 (d) not enough info
21. 21.🧩 Kabir is 10 years old. Aarav is 6 years older than Kabir. How old is Aarav? (a) 16 (b) 6 (c) not enough info (d) 17
22. 22.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
23. 23.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 4 PM
24. 24.🧩 Nisha is 9 years old. Saanvi is older than Nisha. How old is Saanvi? (a) 14 (b) not enough info (c) 10 (d) 11
25. 25.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
26. 26.🧩 Aarav bought 5 pens for ₹175 in all. Each pen cost the same. What did one pen cost? (a) ₹175 (b) not enough info (c) ₹40 (d) ₹35
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
28. 28.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
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.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Kabir is 10 years old. Arjun is older than Kabir. How old is Arjun? (a) 11 (b) 15 (c) not enough info (d) 12
32. 32.🧩 Arjun is 8 years old. Aarav is older than Arjun. How old is Aarav? (a) 13 (b) 10 (c) not enough info (d) 9
33. 33.🧩 Rohan is 10 years old. Ishaan is older than Rohan. How old is Ishaan? (a) not enough info (b) 11 (c) 15 (d) 12
34. 34.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
35. 35.🧩 Arjun bought 3 kites and a lunch box for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹77 (b) ₹80 (c) not enough info (d) ₹26
36. 36.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
37. 37.📊 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
38. 38.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
39. 39.🧩 Meera is 8 years old. Nisha is older than Meera. How old is Nisha? (a) 13 (b) 9 (c) 10 (d) not enough info
40. 40.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info

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