Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 318 · 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.🧩 Kabir is 10 years old. Meera is older than Kabir. How old is Meera? (a) not enough info (b) 15 (c) 11 (d) 12
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
3. 3.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
5. 5.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 7 (b) 70 (c) not enough info (d) 14
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
7. 7.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
8. 8.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
9. 9.🥭 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) no mango is sweet (d) yes, it is certain
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Tara is 12 years old. Arjun is older than Tara. How old is Arjun? (a) 13 (b) 17 (c) 14 (d) not enough info
12. 12.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
14. 14.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 40 (b) 8 (c) not enough info (d) 4
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
16. 16.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
17. 17.🧩 Kabir bought 4 balls and a bag for ₹130 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹126 (c) ₹32 (d) ₹130
18. 18.🧩 A box has 3 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 20 (b) 15 (c) 8 (d) not enough info
19. 19.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
20. 20.🧩 Diya bought 2 markers and a cap for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹78 (b) ₹40 (c) not enough info (d) ₹80
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
22. 22.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
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
24. 24.🧩 Kabir bought 3 mangoes and a lunch box for ₹135 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹45 (c) ₹132 (d) ₹135
25. 25.🧩 Meera is 9 years old. Vihaan is 8 years older than Meera. How old is Vihaan? (a) 8 (b) 17 (c) not enough info (d) 18
26. 26.🧩 Meera bought 3 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹75 (d) ₹25
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
28. 28.🧩 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
29. 29.🧩 Aarav is 9 years old. Saanvi is older than Aarav. How old is Saanvi? (a) not enough info (b) 11 (c) 10 (d) 14
30. 30.🧩 Meera bought 4 mangoes and a lunch box for ₹220 in all. Each mango cost the same. What did one mango cost? (a) ₹216 (b) ₹55 (c) ₹220 (d) not enough info
31. 31.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
32. 32.🧩 Nisha is 12 years old. Rohan is older than Nisha. How old is Rohan? (a) 17 (b) 13 (c) not enough info (d) 14
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
34. 34.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Nisha is 7 years old. Meera is 5 years older than Nisha. How old is Meera? (a) 5 (b) 12 (c) 13 (d) not enough info
36. 36.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
37. 37.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
38. 38.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) not enough info (b) 36 (c) 32 (d) 12
39. 39.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Ishaan is 6 years old. Saanvi is older than Ishaan. How old is Saanvi? (a) 7 (b) 11 (c) 8 (d) not enough info

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