Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 123 · 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: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
3. 3.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
4. 4.🧩 Aarav bought 6 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) ₹20 (c) ₹15 (d) not enough info
5. 5.🧩 Diya bought 5 notebooks and a cap for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹115 (c) ₹24 (d) ₹120
6. 6.🧩 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
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Meera bought 3 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) not enough info (c) ₹25 (d) ₹20
9. 9.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
10. 10.🧩 Rohan is 10 years old. Arjun is older than Rohan. How old is Arjun? (a) 12 (b) 11 (c) not enough info (d) 15
11. 11.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
12. 12.🧩 Aarav bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹120
13. 13.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
18. 18.🧩 A box has 7 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 42 (c) 13 (d) 48
19. 19.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 24 (b) 10 (c) not enough info (d) 28
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
21. 21.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
22. 22.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
23. 23.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
25. 25.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
26. 26.🧩 Rohan is 8 years old. Kabir is older than Rohan. How old is Kabir? (a) 10 (b) not enough info (c) 9 (d) 13
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Saanvi is 7 years old. Meera is older than Saanvi. How old is Meera? (a) 8 (b) not enough info (c) 12 (d) 9
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Saanvi bought 6 notebooks and a water bottle for ₹390 in all. Each notebook cost the same. What did one notebook cost? (a) ₹390 (b) ₹65 (c) not enough info (d) ₹384
37. 37.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
38. 38.🥭 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) yes, it is certain (d) no, check more
39. 39.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Saanvi is 12 years old. Arjun is older than Saanvi. How old is Arjun? (a) 13 (b) not enough info (c) 14 (d) 17

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