Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 361 · 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.🧩 Vihaan is 8 years old. Saanvi is 8 years older than Vihaan. How old is Saanvi? (a) 17 (b) not enough info (c) 16 (d) 8
2. 2.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
3. 3.🧩 Aarav bought 5 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) ₹300 (b) ₹65 (c) ₹60 (d) not enough info
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
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.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
9. 9.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
10. 10.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
12. 12.🧩 Aarav bought 3 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹15 (d) ₹10
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Ananya bought 4 kites and a bag for ₹260 in all. Each kite cost the same. What did one kite cost? (a) ₹260 (b) not enough info (c) ₹65 (d) ₹256
16. 16.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, mangoes match (d) yes, it is certain
17. 17.🧩 Nisha is 11 years old. Saanvi is older than Nisha. How old is Saanvi? (a) 13 (b) not enough info (c) 16 (d) 12
18. 18.🧩 Ananya is 9 years old. Nisha is 2 years older than Ananya. How old is Nisha? (a) 11 (b) not enough info (c) 12 (d) 2
19. 19.🧩 Vihaan bought 4 pens and a bag for ₹70 in all. Each pen cost the same. What did one pen cost? (a) ₹66 (b) ₹70 (c) not enough info (d) ₹17
20. 20.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
21. 21.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) 7 PM (d) not enough info
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.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 7 PM
24. 24.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
25. 25.🧩 Saanvi bought 3 kites for ₹165 in all. Each kite cost the same. What did one kite cost? (a) ₹165 (b) ₹60 (c) not enough info (d) ₹55
26. 26.🧩 Saanvi is 6 years old. Aarav is 6 years older than Saanvi. How old is Aarav? (a) 13 (b) not enough info (c) 12 (d) 6
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Nisha is 12 years old. Saanvi is older than Nisha. How old is Saanvi? (a) 17 (b) 14 (c) not enough info (d) 13
29. 29.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
31. 31.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
32. 32.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 4 PM (d) 8 PM
33. 33.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Kabir bought 2 kites and a cap for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) not enough info (c) ₹55 (d) ₹108
35. 35.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Ishaan bought 3 markers and a lunch box for ₹215 in all. Each marker cost the same. What did one marker cost? (a) ₹215 (b) not enough info (c) ₹71 (d) ₹212
37. 37.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
38. 38.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 4 PM
39. 39.🧩 Vihaan bought 3 pens and a cap for ₹185 in all. Each pen cost the same. What did one pen cost? (a) ₹182 (b) ₹61 (c) not enough info (d) ₹185
40. 40.🧩 A box has 5 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 30 (b) not enough info (c) 25 (d) 10

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