Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 726 · 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.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 5 PM (c) 2 PM (d) not enough info
2. 2.🧩 Meera bought 2 markers and a lunch box for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) not enough info (c) ₹58 (d) ₹60
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
5. 5.🧩 Ishaan bought 2 balls and a lunch box for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹108 (b) not enough info (c) ₹55 (d) ₹110
6. 6.🧩 Ananya bought 5 pens for ₹225 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹45 (c) ₹225 (d) not enough info
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
8. 8.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 7 PM
9. 9.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) for fun only (d) to waste time
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Meera is 10 years old. Diya is 6 years older than Meera. How old is Diya? (a) not enough info (b) 17 (c) 6 (d) 16
15. 15.🧩 Kabir bought 6 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹30 (c) not enough info (d) ₹35
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
17. 17.🧩 Arjun bought 4 balls for ₹220 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹220 (c) ₹55 (d) ₹60
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Diya is 12 years old. Vihaan is 6 years older than Diya. How old is Vihaan? (a) not enough info (b) 19 (c) 6 (d) 18
20. 20.🧩 A box has 7 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 28 (b) not enough info (c) 32 (d) 11
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🧩 Rohan is 12 years old. Arjun is older than Rohan. How old is Arjun? (a) 14 (b) 13 (c) 17 (d) not enough info
23. 23.🧩 A box has 5 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 14 (b) 54 (c) not enough info (d) 45
24. 24.🧩 Saanvi is 10 years old. Diya is 5 years older than Saanvi. How old is Diya? (a) 16 (b) 5 (c) 15 (d) not enough info
25. 25.🧩 Ananya is 11 years old. Rohan is 7 years older than Ananya. How old is Rohan? (a) not enough info (b) 18 (c) 19 (d) 7
26. 26.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
27. 27.🧩 Ishaan bought 6 notebooks and a cap for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹234 (b) ₹40 (c) ₹240 (d) not enough info
28. 28.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Saanvi bought 3 pens for ₹165 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹165 (c) ₹60 (d) not enough info
30. 30.🧩 Diya bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹50 (c) ₹250 (d) not enough info
31. 31.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
32. 32.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
33. 33.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) 50 (c) not enough info (d) 5
34. 34.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
35. 35.🥭 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
36. 36.🧩 Ananya is 11 years old. Nisha is 9 years older than Ananya. How old is Nisha? (a) not enough info (b) 21 (c) 20 (d) 9
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Nisha bought 6 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹10 (d) ₹15
39. 39.🧩 Vihaan bought 3 notebooks and a water bottle for ₹155 in all. Each notebook cost the same. What did one notebook cost? (a) ₹155 (b) ₹152 (c) not enough info (d) ₹51
40. 40.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given

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