Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 26 · 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.🧩 A box has 8 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 17 (b) not enough info (c) 72 (d) 81
2. 2.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
3. 3.🐕 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
4. 4.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Vihaan is 6 years old. Meera is older than Vihaan. How old is Meera? (a) not enough info (b) 7 (c) 11 (d) 8
7. 7.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
8. 8.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
9. 9.🧩 Rohan is 12 years old. Arjun is 7 years older than Rohan. How old is Arjun? (a) not enough info (b) 19 (c) 7 (d) 20
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Rohan bought 3 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) not enough info (c) ₹35 (d) ₹30
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.🧩 Diya is 7 years old. Vihaan is 5 years older than Diya. How old is Vihaan? (a) not enough info (b) 13 (c) 5 (d) 12
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
15. 15.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 90 (c) not enough info (d) 9
16. 16.🧩 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
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Ananya bought 3 notebooks for ₹45 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹20 (c) not enough info (d) ₹15
19. 19.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
20. 20.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Diya is 12 years old. Meera is 4 years older than Diya. How old is Meera? (a) 4 (b) not enough info (c) 16 (d) 17
24. 24.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
25. 25.🧩 A box has 3 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 28 (b) not enough info (c) 21 (d) 10
26. 26.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
27. 27.🧩 Diya is 8 years old. Aarav is older than Diya. How old is Aarav? (a) not enough info (b) 13 (c) 9 (d) 10
28. 28.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) not enough info (d) 5 PM
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: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
32. 32.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
33. 33.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) no mango is sweet (d) yes, it is certain
34. 34.🧩 Vihaan is 8 years old. Nisha is older than Vihaan. How old is Nisha? (a) not enough info (b) 13 (c) 10 (d) 9
35. 35.🧩 Meera bought 6 mangoes for ₹360 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹65 (c) ₹360 (d) ₹60
36. 36.🧩 Diya bought 3 markers and a lunch box for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹73 (b) ₹220 (c) not enough info (d) ₹217
37. 37.🧩 Meera bought 4 mangoes and a bag for ₹310 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹306 (c) ₹310 (d) ₹77
38. 38.🧩 Diya bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹65 (c) not enough info (d) ₹60
39. 39.🧩 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
40. 40.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM

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