Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 230 · 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) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
2. 2.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
3. 3.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) 4 (c) not enough info (d) 40
4. 4.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
6. 6.🧩 A box has 4 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 36 (b) 13 (c) not enough info (d) 45
7. 7.🧩 Tara bought 4 pens for ₹140 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹140 (d) ₹35
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Nisha bought 2 kites and a bag for ₹190 in all. Each kite cost the same. What did one kite cost? (a) ₹190 (b) not enough info (c) ₹95 (d) ₹188
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Vihaan bought 6 balls and a cap for ₹320 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹53 (c) ₹314 (d) ₹320
12. 12.🧩 Vihaan bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) not enough info (c) ₹65 (d) ₹60
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
14. 14.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
15. 15.🧩 Aarav bought 3 notebooks and a lunch box for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹70 (c) ₹67 (d) ₹23
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
17. 17.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
19. 19.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
20. 20.🧩 Rohan bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹25 (c) ₹100 (d) ₹30
21. 21.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
26. 26.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 9 PM
27. 27.🧩 Aarav bought 4 markers and a water bottle for ₹140 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹140 (c) ₹35 (d) ₹136
28. 28.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
29. 29.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 5 PM
30. 30.🧩 Ishaan is 8 years old. Kabir is older than Ishaan. How old is Kabir? (a) not enough info (b) 10 (c) 9 (d) 13
31. 31.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 8 PM (d) 9 PM
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
33. 33.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
34. 34.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
35. 35.🧩 Kabir is 12 years old. Vihaan is 9 years older than Kabir. How old is Vihaan? (a) 21 (b) 22 (c) not enough info (d) 9
36. 36.🧩 Ananya is 9 years old. Saanvi is 6 years older than Ananya. How old is Saanvi? (a) 6 (b) not enough info (c) 15 (d) 16
37. 37.🥭 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) no mango is sweet (c) yes, mangoes match (d) no, check more
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
39. 39.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 4 PM
40. 40.🧩 Rohan is 6 years old. Arjun is older than Rohan. How old is Arjun? (a) not enough info (b) 11 (c) 7 (d) 8

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