Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 294 · 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.🧩 Kabir is 11 years old. Rohan is older than Kabir. How old is Rohan? (a) 12 (b) 16 (c) not enough info (d) 13
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
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.🧩 Meera is 7 years old. Tara is 9 years older than Meera. How old is Tara? (a) not enough info (b) 17 (c) 9 (d) 16
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
7. 7.🥭 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, mangoes match (c) no, check more (d) yes, it is certain
8. 8.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
9. 9.True or false: “We measured the plant every day for a month; it grew 9 cm.” 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) enough evidence (b) not enough evidence
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
12. 12.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
13. 13.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
14. 14.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
15. 15.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 7 PM
16. 16.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
17. 17.🧩 Tara bought 6 notebooks and a bag for ₹270 in all. Each notebook cost the same. What did one notebook cost? (a) ₹264 (b) not enough info (c) ₹45 (d) ₹270
18. 18.🧩 Ishaan bought 5 markers and a lunch box for ₹130 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹130 (c) ₹26 (d) ₹125
19. 19.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
20. 20.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
21. 21.🧩 Ishaan bought 4 notebooks and a water bottle for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹206 (b) ₹210 (c) not enough info (d) ₹52
22. 22.🧩 Kabir bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹100
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
24. 24.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 10 (b) 28 (c) 21 (d) not enough info
25. 25.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
26. 26.🧩 Meera is 7 years old. Arjun is older than Meera. How old is Arjun? (a) 12 (b) 9 (c) not enough info (d) 8
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
28. 28.🧩 Kabir bought 3 markers and a water bottle for ₹205 in all. Each marker cost the same. What did one marker cost? (a) ₹202 (b) not enough info (c) ₹205 (d) ₹68
29. 29.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
30. 30.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) not enough info (d) 6 PM
31. 31.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
32. 32.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
33. 33.🧩 Tara is 7 years old. Ishaan is 8 years older than Tara. How old is Ishaan? (a) not enough info (b) 8 (c) 16 (d) 15
34. 34.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
35. 35.🧩 Kabir bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹50 (d) ₹135
36. 36.🧩 A box has 7 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 72 (c) 16 (d) 63
37. 37.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
38. 38.🧩 Ananya is 12 years old. Rohan is 3 years older than Ananya. How old is Rohan? (a) 16 (b) 3 (c) 15 (d) not enough info
39. 39.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
40. 40.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 40 (b) 45 (c) not enough info (d) 13

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