Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 534 · 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.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
2. 2.🧩 Aarav is 11 years old. Diya is 3 years older than Aarav. How old is Diya? (a) 14 (b) 15 (c) 3 (d) not enough info
3. 3.🧩 Kabir is 6 years old. Ishaan is 7 years older than Kabir. How old is Ishaan? (a) 7 (b) 14 (c) 13 (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.🧩 Diya is 8 years old. Rohan is 8 years older than Diya. How old is Rohan? (a) 17 (b) 8 (c) not enough info (d) 16
6. 6.🧩 Ishaan bought 4 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹120 (c) not enough info (d) ₹30
7. 7.🧩 Ananya bought 6 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹90 (d) ₹15
8. 8.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM
9. 9.🧩 Tara bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹300
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
12. 12.🧩 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
13. 13.🧩 Diya bought 2 notebooks and a water bottle for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹138 (b) ₹140 (c) ₹70 (d) not enough info
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
15. 15.🥭 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) yes, it is certain (c) no, check more (d) yes, mangoes match
16. 16.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
17. 17.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
19. 19.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
20. 20.🧩 Arjun bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) ₹50 (c) not enough info (d) ₹225
21. 21.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
22. 22.🧩 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
23. 23.🧩 Saanvi bought 4 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹30 (c) ₹25 (d) not enough info
24. 24.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 8 (b) 15 (c) not enough info (d) 20
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
26. 26.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
27. 27.🧩 Aarav bought 4 kites for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹220 (c) ₹55 (d) not enough info
28. 28.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.🧩 Diya is 11 years old. Ananya is older than Diya. How old is Ananya? (a) not enough info (b) 16 (c) 13 (d) 12
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
32. 32.🧩 A box has 6 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) not enough info (b) 12 (c) 42 (d) 36
33. 33.🧩 Kabir is 6 years old. Meera is older than Kabir. How old is Meera? (a) 11 (b) 7 (c) not enough info (d) 8
34. 34.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 8 PM
35. 35.🧩 Arjun bought 5 balls for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹250
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
38. 38.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
39. 39.🧩 Nisha bought 5 kites and a bag for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) not enough info (c) ₹95 (d) ₹100
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True

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