Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 263 · 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.🥭 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, it is certain (d) yes, mangoes match
2. 2.🧩 Tara bought 6 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹120 (c) ₹25 (d) ₹20
3. 3.🧩 Arjun is 8 years old. Aarav is older than Arjun. How old is Aarav? (a) 10 (b) 9 (c) not enough info (d) 13
4. 4.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
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.🧩 Aarav is 12 years old. Kabir is older than Aarav. How old is Kabir? (a) not enough info (b) 14 (c) 13 (d) 17
7. 7.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
8. 8.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Kabir is 7 years old. Arjun is 2 years older than Kabir. How old is Arjun? (a) 10 (b) not enough info (c) 2 (d) 9
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Rohan bought 6 notebooks and a cap for ₹320 in all. Each notebook cost the same. What did one notebook cost? (a) ₹53 (b) ₹314 (c) not enough info (d) ₹320
12. 12.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Rohan is 6 years old. Aarav is older than Rohan. How old is Aarav? (a) not enough info (b) 7 (c) 8 (d) 11
15. 15.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
16. 16.🧩 A box has 5 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 13 (b) 40 (c) 48 (d) not enough info
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
18. 18.🧩 Aarav is 10 years old. Diya is older than Aarav. How old is Diya? (a) not enough info (b) 15 (c) 12 (d) 11
19. 19.🐕 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
20. 20.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 2 PM
21. 21.🧩 Rohan bought 6 markers and a lunch box for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹114 (b) not enough info (c) ₹120 (d) ₹20
22. 22.🧩 Kabir is 8 years old. Vihaan is 8 years older than Kabir. How old is Vihaan? (a) not enough info (b) 8 (c) 16 (d) 17
23. 23.🧩 Diya bought 2 notebooks and a cap for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹80 (c) ₹158 (d) ₹160
24. 24.🧩 Nisha bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹50 (c) not enough info (d) ₹45
25. 25.🧩 Ishaan is 9 years old. Arjun is 3 years older than Ishaan. How old is Arjun? (a) 3 (b) 13 (c) not enough info (d) 12
26. 26.🧩 A box has 7 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 16 (b) not enough info (c) 63 (d) 72
27. 27.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 6 PM
28. 28.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 9 PM
29. 29.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
31. 31.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
32. 32.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 36 (c) 32 (d) 12
33. 33.🧩 Rohan is 8 years old. Diya is 8 years older than Rohan. How old is Diya? (a) 8 (b) 16 (c) 17 (d) not enough info
34. 34.🧩 Ishaan bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹15 (d) ₹20
35. 35.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
36. 36.🧩 Vihaan bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) not enough info (c) ₹30 (d) ₹15
37. 37.🧩 Kabir is 12 years old. Ananya is 3 years older than Kabir. How old is Ananya? (a) 15 (b) 3 (c) 16 (d) not enough info
38. 38.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
39. 39.🧩 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
40. 40.🧩 Meera bought 5 notebooks and a bag for ₹290 in all. Each notebook cost the same. What did one notebook cost? (a) ₹290 (b) ₹285 (c) ₹58 (d) not enough info

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