Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 448 · 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.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
2. 2.🧩 Rohan bought 5 balls and a lunch box for ₹170 in all. Each ball cost the same. What did one ball cost? (a) ₹170 (b) ₹34 (c) ₹165 (d) not enough info
3. 3.🧩 Aarav bought 2 balls and a bag for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹38 (c) ₹40 (d) not enough info
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Arjun is 12 years old. Meera is 8 years older than Arjun. How old is Meera? (a) 8 (b) not enough info (c) 20 (d) 21
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
7. 7.🧩 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
8. 8.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Kabir bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹55 (c) ₹275 (d) not enough info
11. 11.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
12. 12.🧩 Aarav is 9 years old. Meera is older than Aarav. How old is Meera? (a) 10 (b) 14 (c) 11 (d) not enough info
13. 13.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 24 (c) 10 (d) 28
14. 14.🧩 Diya is 10 years old. Rohan is older than Diya. How old is Rohan? (a) not enough info (b) 15 (c) 11 (d) 12
15. 15.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
16. 16.🧩 Arjun is 8 years old. Tara is 6 years older than Arjun. How old is Tara? (a) not enough info (b) 14 (c) 15 (d) 6
17. 17.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 10 (b) 28 (c) not enough info (d) 21
18. 18.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 7 (b) not enough info (c) 12 (d) 16
19. 19.🧩 Arjun is 9 years old. Kabir is older than Arjun. How old is Kabir? (a) 10 (b) not enough info (c) 11 (d) 14
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
22. 22.🧩 Nisha bought 2 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) not enough info (c) ₹80 (d) ₹40
23. 23.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 4 PM
24. 24.🧩 Ishaan is 8 years old. Arjun is older than Ishaan. How old is Arjun? (a) 10 (b) not enough info (c) 9 (d) 13
25. 25.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
26. 26.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
27. 27.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
28. 28.🧩 Meera bought 2 markers and a water bottle for ₹110 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹110 (c) ₹108 (d) ₹55
29. 29.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
30. 30.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
31. 31.🧩 Ishaan is 10 years old. Arjun is 3 years older than Ishaan. How old is Arjun? (a) 14 (b) 3 (c) not enough info (d) 13
32. 32.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 4 PM
33. 33.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
34. 34.🧩 Diya bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹360 (c) not enough info (d) ₹65
35. 35.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
36. 36.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
37. 37.🧩 Nisha bought 5 pens and a lunch box for ₹305 in all. Each pen cost the same. What did one pen cost? (a) ₹61 (b) ₹305 (c) not enough info (d) ₹300
38. 38.🧩 Meera bought 5 mangoes and a cap for ₹345 in all. Each mango cost the same. What did one mango cost? (a) ₹69 (b) ₹340 (c) not enough info (d) ₹345
39. 39.🧩 Nisha bought 2 kites and a lunch box for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹118 (c) ₹60 (d) not enough info
40. 40.🧩 Ananya is 8 years old. Kabir is older than Ananya. How old is Kabir? (a) 10 (b) 9 (c) 13 (d) not enough info

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