Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 603 · 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 tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
5. 5.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 5 PM
6. 6.🧩 Tara is 9 years old. Diya is older than Tara. How old is Diya? (a) 10 (b) not enough info (c) 14 (d) 11
7. 7.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
8. 8.🧩 Saanvi bought 2 kites for ₹50 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) ₹50 (c) ₹25 (d) not enough info
9. 9.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
11. 11.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 7 PM (c) 6 PM (d) not enough info
13. 13.🧩 Kabir is 11 years old. Arjun is 8 years older than Kabir. How old is Arjun? (a) not enough info (b) 19 (c) 20 (d) 8
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
15. 15.📊 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
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
18. 18.🧩 Aarav bought 2 pens and a lunch box for ₹90 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹88 (c) not enough info (d) ₹90
19. 19.🧩 Ishaan is 11 years old. Meera is 3 years older than Ishaan. How old is Meera? (a) 14 (b) 15 (c) not enough info (d) 3
20. 20.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Saanvi bought 4 pens and a cap for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) not enough info (c) ₹67 (d) ₹266
22. 22.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
23. 23.🧩 Nisha is 9 years old. Rohan is 9 years older than Nisha. How old is Rohan? (a) not enough info (b) 18 (c) 19 (d) 9
24. 24.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Nisha bought 2 pens and a cap for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹140 (b) ₹138 (c) not enough info (d) ₹70
26. 26.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
27. 27.🧩 Meera is 10 years old. Rohan is older than Meera. How old is Rohan? (a) 15 (b) 12 (c) 11 (d) not enough info
28. 28.🧩 Diya bought 2 pens and a water bottle for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹65 (b) ₹128 (c) ₹130 (d) not enough info
29. 29.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 8 PM
30. 30.🧩 Ishaan is 11 years old. Aarav is older than Ishaan. How old is Aarav? (a) 13 (b) not enough info (c) 16 (d) 12
31. 31.🧩 A box has 6 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 24 (b) 28 (c) 10 (d) not enough info
32. 32.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
34. 34.🧩 Arjun bought 2 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) ₹40 (c) not enough info (d) ₹80
35. 35.🧩 Tara bought 4 balls and a water bottle for ₹260 in all. Each ball cost the same. What did one ball cost? (a) ₹256 (b) not enough info (c) ₹260 (d) ₹65
36. 36.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
37. 37.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
38. 38.🧩 A box has 6 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 10 (b) 24 (c) 28 (d) not enough info
39. 39.🧩 Arjun bought 3 notebooks and a lunch box for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹77 (c) ₹80 (d) ₹26
40. 40.🧩 Kabir is 6 years old. Diya is older than Kabir. How old is Diya? (a) 7 (b) 8 (c) 11 (d) not enough info

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