Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 30 · 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.🧩 Rohan bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹35 (c) ₹70 (d) ₹40
2. 2.🧩 Aarav bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) not enough info (c) ₹220 (d) ₹60
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
4. 4.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 6 (b) 12 (c) 60 (d) not enough info
5. 5.🧩 Rohan bought 6 markers and a bag for ₹320 in all. Each marker cost the same. What did one marker cost? (a) ₹314 (b) ₹53 (c) not enough info (d) ₹320
6. 6.🧩 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
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: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
9. 9.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 25 (b) not enough info (c) 20 (d) 9
10. 10.🧩 Kabir bought 2 pens and a cap for ₹70 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) not enough info (c) ₹68 (d) ₹70
11. 11.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
12. 12.🧩 Diya bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) not enough info (c) ₹45 (d) ₹270
13. 13.🧩 Rohan is 11 years old. Ananya is 3 years older than Rohan. How old is Ananya? (a) 14 (b) not enough info (c) 15 (d) 3
14. 14.🧩 Meera is 8 years old. Tara is 4 years older than Meera. How old is Tara? (a) 4 (b) 13 (c) not enough info (d) 12
15. 15.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
16. 16.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 5 PM
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
19. 19.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
20. 20.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Ishaan is 7 years old. Tara is 3 years older than Ishaan. How old is Tara? (a) 11 (b) not enough info (c) 3 (d) 10
22. 22.🧩 Nisha is 6 years old. Arjun is 7 years older than Nisha. How old is Arjun? (a) not enough info (b) 13 (c) 14 (d) 7
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
24. 24.🧩 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
25. 25.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Diya is 8 years old. Ananya is 3 years older than Diya. How old is Ananya? (a) not enough info (b) 3 (c) 11 (d) 12
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
28. 28.🧩 Diya bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹35 (d) ₹70
29. 29.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 40 (c) 4 (d) 8
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
31. 31.🧩 A box has 7 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 56 (b) not enough info (c) 15 (d) 64
32. 32.🧩 Nisha is 12 years old. Ananya is 5 years older than Nisha. How old is Ananya? (a) 18 (b) 5 (c) 17 (d) not enough info
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
35. 35.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) 6 PM (d) not enough info
36. 36.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
37. 37.🧩 Ananya is 12 years old. Kabir is older than Ananya. How old is Kabir? (a) 14 (b) 13 (c) 17 (d) not enough info
38. 38.🧩 Diya is 11 years old. Rohan is 4 years older than Diya. How old is Rohan? (a) 16 (b) 4 (c) 15 (d) not enough info
39. 39.🧩 A box has 3 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 24 (b) not enough info (c) 11 (d) 32
40. 40.🧩 Aarav is 7 years old. Meera is older than Aarav. How old is Meera? (a) 12 (b) 8 (c) not enough info (d) 9

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