Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 101 · 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.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Aarav is 7 years old. Arjun is 9 years older than Aarav. How old is Arjun? (a) 16 (b) 17 (c) not enough info (d) 9
3. 3.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Rohan bought 3 notebooks and a cap for ₹65 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹21 (c) ₹62 (d) ₹65
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
6. 6.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
7. 7.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
8. 8.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
9. 9.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 6 PM
10. 10.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 7 PM
11. 11.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
13. 13.🧩 Arjun bought 5 mangoes for ₹175 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹175 (c) ₹40 (d) ₹35
14. 14.🧩 Aarav is 9 years old. Meera is 3 years older than Aarav. How old is Meera? (a) 13 (b) 3 (c) 12 (d) not enough info
15. 15.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) 2 PM (d) not enough info
16. 16.🧩 Rohan is 10 years old. Aarav is 2 years older than Rohan. How old is Aarav? (a) not enough info (b) 13 (c) 12 (d) 2
17. 17.🧩 Kabir is 6 years old. Meera is 2 years older than Kabir. How old is Meera? (a) 8 (b) 2 (c) 9 (d) not enough info
18. 18.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
19. 19.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Ishaan is 8 years old. Nisha is 7 years older than Ishaan. How old is Nisha? (a) 16 (b) 7 (c) not enough info (d) 15
22. 22.🧩 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
23. 23.🧩 Kabir is 6 years old. Diya is 6 years older than Kabir. How old is Diya? (a) 6 (b) 12 (c) not enough info (d) 13
24. 24.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Aarav bought 4 notebooks for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹200
28. 28.🧩 Aarav bought 3 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹25 (c) ₹60 (d) ₹20
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Nisha is 12 years old. Arjun is older than Nisha. How old is Arjun? (a) not enough info (b) 17 (c) 13 (d) 14
31. 31.🧩 Kabir bought 5 kites and a water bottle for ₹245 in all. Each kite cost the same. What did one kite cost? (a) ₹245 (b) not enough info (c) ₹49 (d) ₹240
32. 32.🧩 Diya is 7 years old. Aarav is 5 years older than Diya. How old is Aarav? (a) 13 (b) not enough info (c) 5 (d) 12
33. 33.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 36 (b) 42 (c) 12 (d) not enough info
34. 34.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 27 (c) 12 (d) 36
35. 35.🧩 Saanvi bought 3 markers and a bag for ₹135 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) not enough info (c) ₹135 (d) ₹132
36. 36.🧩 Arjun bought 2 kites and a lunch box for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹108 (b) ₹110 (c) ₹55 (d) not enough info
37. 37.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 8 PM (d) 7 PM
38. 38.🧩 Meera bought 2 pens and a bag for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹118 (b) not enough info (c) ₹120 (d) ₹60
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
40. 40.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) not enough info (d) 6 PM

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